Israel has reportedly told US officials that it was behind the assassination of a senior member of Iran’s Islamic Revolutionary Guard Corps earlier this week, in an effort to warn Tehran against the continued operation of an alleged covert unit the target helped lead.

Axar.az reports an unnamed intelligence official told The New York Times on Wednesday that Israeli officials had passed along information about the killing of Col. Hassan Sayyad Khodaei, who was shot dead outside his Tehran home on Sunday.

The report did not specify which country the intelligence official represented, but according to Ynet, the Israeli security establishment believes the source was American and is furious about the leak. Israeli officials told the news site that they are demanding answers from their American counterparts, as the report places responsibility for the killing solely on Israel and absolves the US of having played any role. The officials expressed concern that the report might lead to a spike in Iranian attacks against Israeli targets.