Palestinians make hole to Egypt
Earlier Egyptian security forces tried to block almost all illegal entry points, using water cannon and firing warning shots to drive back crowds.
Hamas, which controls Gaza, says it backs the decision to close the border.
Hundreds of thousands have surged into Egypt to buy supplies since militants first blew holes in the border on Wednesday.
Israel has demanded Egypt take action, as it is worried about arms smuggling.
The UN has estimated that as much as half of Gaza’s 1.5 million population has crossed the border in defiance of the Israeli blockade imposed in retaliation for rocket attacks.
The large yellow bulldozer was driven to the border from the Gaza side, ploughing headlong into the border fence.
The BBC’s Ian Pannell at the border says Egyptian security forces seem to have given up their efforts to stop the Palestinians streaming through.
The incident is a humiliating setback for Cairo, which must now decide how to respond, our correspondent says.
The new breach came hours after Egyptian security forces had begun to stop Palestinians from entering their country while at the same time allowing people back into Gaza.
Riot police armed with electric batons attempted to seal the breach, while water cannons were aimed above the heads of the jostling crowd after some Palestinians threw stones.
Live shots were also fired from both sides.
Egyptian border guards meanwhile began placing piles of barbed wire and chain-link fences along the border in an attempt to re-seal it.
Those returning from Egypt said police had been using loudspeakers to announce in several nearby towns that the border would be resealed later in the afternoon.
Hamas, the Islamist movement which seized control of Gaza in June, has said it supports Egypt’s decision to close the border. It has denied any involvement in the new breach.
But unless the group agrees to help police the border, it will be very difficult to keep it closed, the BBC’s Ian Pannell in Rafah says.
The move by the Egyptian authorities came only hours after the US Secretary of State, Condoleezza Rice, urged them to secure the border with Gaza.
On Thursday evening, Ms Rice said she understood Egypt’s position was "difficult", but said: "It is an international border, it needs to be protected and I believe that the Egyptians understand the importance of doing that."
Later, Egyptian foreign ministry spokesman Hossam Zaki promised the border would "go back as normal".
Israel has stepped up its security since the border fence was destroyed, with citizens warned against travelling to the Sinai peninsula in Egypt.
A spokesman for public security minister Avi Dichter told the Associated Press news agency that police were on increased alert, because of "intelligence warnings that terrorists will infiltrate Israel".
It is also worried that militant groups based in Gaza will have taken advantage of the freedom of movement to bolster their weapons stores.
Overnight on Thursday, the Israeli military carried out two air strikes near the border, killing four suspected Hamas militants.
The commander of the Islamist movement’s military wing in Rafah, Mohammed Abu Harb, was killed along with another senior militant when Israeli missiles hit their jeep in the town, Palestinian medics said.
Another two other members of the group were killed two hours earlier in an Israeli air strike on a truck in southern Rafah.
Israel has killed more than 40 Palestinians in Gaza during the past 10 days in addition to tightening its blockade of the coastal territory, which has been used by militants to fire rockets into the Jewish state. /APA/
Domestic
Ramiz Mehdiyev expelled from New Azerbaijan Party, deprivation of his awards proposed - UPDATED-4
Speaker: Ilham Aliyev’s election as President in 2003 holds special place in country’s history
Azerbaijani Parliament sends congratulatory letter to President and First Vice-President on Independence Restoration Day
Azerbaijani Parliament begins its next session
NEWS FEED
Erdoğan congratulates Azerbaijan on Restoration of Independence Day
Iran’s new defence minister warns US against fresh attacks
OTS Secretary General congratulates Azerbaijan on Restoration of Independence Day
Turkish Foreign Ministry congratulates Azerbaijan on Restoration of Independence Day
Ukraine currently lacks access to Starshield military communications system — Rubio
Lithuanian foreign minister congratulates Azerbaijan on Restoration of Independence Day
First VP Mehriban Aliyeva makes post on Restoration of Independence Day
Saudi-led coalition says helicopter crash in Najran kills two crew members
EU spending on Russian LNG imports rises 9.5%
Trump’s decision to delay Russia sanctions draws bipartisan criticism in Congress
Man shot and killed inside New York City subway station in Midtown Manhattan: NYPD
Moscow mayor says nearly 200 Ukrainian drones destroyed while heading for city
Trump accused Biden of handing over huge amount of weapons to Kyiv for free
19 people detained for attempting to incident among fans during Qarabag–Neftchi match
Azerbaijan marks 35 years since restoring independence
Azerbaijan marks 6th anniversary of Khudaferin village's liberation
US President expects gasoline prices to fall after the war with Iran ends
Macron promised to punish those responsible for violence during protests in France
Bayern Munich thrashed Leipzig 6-1 in a German championship match
Trump: 'Amazing' Canada deal coming at some point
Barcelona thrashed Betis thanks to Rodri's debut goal
Iran and Pakistan temporarily suspended border crossings
Kenya’s Ebola cases rise to 7, including health workers who cared for the first patient
Match between Azerbaijani football clubs Neftchi and Qarabag ends with draw
Merz warns of serious political rift in Germany
Clashes on Pakistan-Afghanistan border leave fatalities
Sounds of explosions heard in southern Iran, near Strait of Hormuz
Galatasaray beat Genclerbirligi, Batrakov played the entire match
French police clash with protesters as tens of thousands rally over cost of living
Former White House press secretary calls working with Trump honor after leaving
Pope Leo XIV discharged from hospital - UPDATED
Hurricane Trudy threatens western Mexico with heavy rain, coastal flooding
Fire destroys over 200 shacks in S. Africa's KwaZulu-Natal
At least 10 killed in fire at Bangladesh beach resort
Houthis release 159 prisoners affiliated with Yemeni government
Tear gas, clashes hit French cities in cost-of-living protests
Protest held in Kyiv demanding Klitschko's resignation
Iranian FM: We have proposed seven-day plan to US to reopen Strait of Hormuz, choice is theirs
Fuzuli City Day celebrated - PHOTO
Zelenskyy believes US will continue lifting sanctions against Russia
Azerbaijan's President awards Sharaf Order to Valeh Alasgarov
Next phase of “Falcons Meet – 2026” exercise conduct training flights - VIDEO
Two dead, three injured in car accident in Azerbaijan's Bilasuvar
Azerbaijan plans to resettle residents in two Fuzuli villages by year-end
NATO training course concludes in Baku - VIDEO
Egypt’s Sisi says presidential term will end in 2030, rules out constitutional changes
Mayor: Air defense systems shoot down 144 Ukrainian drones approaching Moscow overnight
Zelenskyy expresses regret over Trump's decision to suspend new sanctions against Russia
5.2-magnitude quake hits Off Coast of Ecuador - GFZ
Azerbaijan announces value of electricity, gas and steam production