Britain has evacuated its ambassador and all embassy staff from Iran, a U.K. official said Wednesday, as U.S. President Donald Trump weighs launching strikes against the Islamist regime.

The official, who was not authorized to speak publicly, said the decision had been taken based on the assessment of the security situation and to prioritize the safety of staff.

A U.K. government spokesperson said: “We have temporarily closed the British Embassy in Tehran, this will now operate remotely. 

“Foreign Office travel advice has now been updated to reflect this consular change.”

The move came shortly after the U.S. ordered the evacuation of some personnel from the Al Udeid Air Base in Qatar, its largest base in the Middle East, which hosts 10,000 U.S. troops.

A former U.S. official familiar with the situation said aircraft had also been moved. Reuters first reported the evacuation.

The U.K. already advises against all travel to Iran and for British nationals already in the country to “carefully consider” their continued presence.

Britain’s envoy to Iran was summoned alongside European diplomats on Monday to a fractious meeting with Iranian Foreign Minister Abbas Araghchi, European officials said. In turn, Britain’s Middle East Minister Hamish Falconer summoned Iran’s Ambassador to London for a meeting Tuesday.

Speaking to POLITICO on a tour of Finland and Norway — before the evacuation was public — U.K. Foreign Secretary Yvette Cooper praised Tehran’s “brave protesters, especially for women to be out protesting, who are facing such huge repression in their daily lives.”

With some protesters facing execution, she said: “Iran needs to understand the whole world is watching, and they need to end this violence. The idea that they would escalate the violence further with these executions is absolutely horrific.”

Cooper said her priority was sanctions and economic pressure on Iran rather than military strikes. However, she did not rule out allowing the U.S. to use British resources, including air bases, to launch such strikes.