Four people were killed in what is said to be a drone attack.
The Hamas office is located near a popular pastry shop, according to NNA.
The AP news agency is reporting an explosion that occurred in one of Beirut’s southern suburbs on Tuesday, but it is unclear if it is the same incident.
The Hezbollah militia television channel reports that high-ranking Hamas leader Saleh Arouri has been killed in an explosion in southern Beirut.
Israel’s military and the extremist Hezbollah militia have repeatedly fired at each other along Lebanon’s southern border since the war in Gaza broke out in early October.
Earlier on Tuesday, Hezbollah stated that it has carried out several attacks against Israeli military posts along the border.