An Israeli strike on a densely populated district of Beirut on Sunday killed Hezbollah's media relations chief Mohammad Afif, two Lebanese security sources told Reuters.
The strike hit Ras el-Nabaa, a neighborhood where many people displaced from Beirut's southern suburbs had been seeking refuge.
The security sources said it struck a building where the offices of the Baath Party are located, and the head of the party in Lebanon, Ali Hijazi, told a local TV station that Afif was in the building.
The Lebanese health ministry said the strike killed one and injured three.
Afif was a long-time media adviser to Hezbollah secretary-general Hassan Nasrallah, who was killed in an Israeli air attack on the southern suburbs of Beirut on Sept. 27.
He managed Hezbollah's Al-Manar television station for several years before taking over the group's media office.
Afif hosted several press conferences for journalists amid the rubble in Beirut's southern suburbs. In his most recent comments to reporters on Nov. 11, he said Israeli troops had been unable to hold any territory in Lebanon, and that Hezbollah had enough weapons and supplies to fight a long war.
Later on Sunday, another strike in central Beirut hit a computer shop, killing two people and wounding 13, the health ministry said.
Israeli media claimed that the attack in Mar Elias street targeted a Hezbollah official.