The Israeli military confirmed Tuesday that it had killed a Hezbollah and Iran Quds Forces operative in an overnight strike on Beirut’s southern suburbs.

“Hassan Ali Mahmoud Bdeir, a terrorist in Hezbollah’s Unit 3900 and the Iranian Quds Force, was eliminated in the Dahieh area,” the Israel Defense Forces (IDF) said on social media.

“Bdeir recently operated in cooperation with the Hamas terrorist organization, assisting them in planning and advancing a significant and imminent terror attack against Israeli civilians.”

The IDF said it acted on the advice of Israeli intelligence and struck the apartment building “given the immediacy of the threat.”

A source close to Hezbollah, speaking on condition of anonymity as they were not authorized to brief the media, also confirmed the death to the AFP news agency, saying the strike killed Hassan Bdeir, Hezbollah’s “deputy head for the Palestinian file” who was “at home with his family.

Lebanese Prime Minister Nawaf Salam has said an Israeli strike on south Beirut on Tuesday was a “clear breach” of a ceasefire put in place after more than a year of conflict between Israel and the Iran-backed Hezbollah militia.

Salam’s office issued a statement describing the strike as “a clear breach of the arrangements of the cessation of hostilities” and a “flagrant violation of United Nations Resolution 1701.” 

That Security Council decision ended a 2006 war between Israel and Hezbollah and served as the basis of the current truce agreed in late November.

Salam also said he has been closely monitoring the aftermath of the strike in coordination with the ministers of defense and the interior.