Israeli Prime Minister Benjamin Netanyahu will cut short his trip to New York and return to Israel on Friday, his office said in a statement, following the Israeli strike on Hezbollah’s command center in the Lebanese capital Beirut.

The heaviest raid since the 2006 war was launched by the Israeli army, Israeli warplanes this afternoon bombed the “headquarters” of Hezbollah in the southern suburbs of Beirut, which was aimed at the leader of the organization, Hassan Nasrallah.

Hezbollah leader Hassan Nasrallah “is fine,” a source close to the organization said, cited by AFP.

Iran’s Tasnim news agency also reported that Nasrallah was “safe”. However, a senior Iranian security official told Reuters that Tehran was investigating Nasrallah’s fate.

Loud explosions could be heard throughout the city from the successive airstrikes, while buildings were flattened.

Six buildings were completely destroyed in the strikes, a source close to Hezbollah said. The explosions caused huge craters in several places, according to Hezbollah’s Al-Manar TV channel.

The Lebanese news agency and Hezbollah’s television network, Al Manar broadcast images of a huge crater and huge cloud of smoke rising over the city. Residents heard multiple loud explosions. Ambulance sirens are heard throughout the Lebanese capital.

“The Israeli Air Force carried out a precision strike on Hezbollah’s headquarters in the Lebanese capital Beirut a short while ago,” Israeli military spokesman Rear Admiral Daniel Hagari said shortly before 7:00 p.m.

He said the headquarters was built under buildings where civilians lived in the suburb of Dahiyeh, a stronghold of the Shiite group.

A Lebanese security source said the raids targeted an area where top Hezbollah officials are located.