Tensions between Tehran and Washington escalated after the US downed an American military drone; Iran claims the UAV violated its airspace and didn't respond to demands to alter course, APA reports citing Sputnik.
Oman didn't relay the US message to Iran about the UAV, which was downed by Iranian air defences on 20 June, the country's Foreign Ministry stated on Twitter.
"The Sultanate is watching current regional developments with concern and hopes that the Iranian and American sides show restraint and address unresolved issues through dialogue", the ministry's tweet said.
Earlier, Reuters reported, citing unnamed Iranian officials, that Tehran had received a message from President Donald Trump about an upcoming attack in response to the downing of the American drone, which was allegedly delivered via Oman.