A rocket exploded at the US Embassy in Afghanistan, reported the Associated Press, on the anniversary of the 9/11 attacks.

The sound of sirens followed the explosion that rocked central Kabul where the compound is located, according to AP, as a plume of smoke rose over the capital at around midnight.

“An explosion caused by a rocket has occurred on the compound,” a message relayed to employees inside the embassy, where officials gave the all-clear about an hour later.

There were no injuries reported.

A car bomb attack last week in the capital that killed a U.S. service member prompted President Donald Trump to call off secret talks he was planning to conduct with Afghan President Ashraf Ghani and Taliban leaders at Camp David.

“They thought that they had to kill people to put themselves in a little better negotiating position,” Trump told White House reporters on Monday, Sept. 9, calling the attack “a big mistake.”

“As far as I’m concerned,” Trump said in reference to the talks, “they are dead.”