A top Iranian official has pledged his country’s unwavering support for Lebanon after talks with Lebanese leaders on the ongoing war between Israel and Hezbollah.

Hezbollah is considering a US-Israeli ceasefire proposal, sources told CNN, as diplomatic efforts to end the conflict between Israel and the Lebanese militant group intensify.

Israel carried out more strikes on Hezbollah targets in Lebanon Friday, leveling a building in Beirut. The attack comes as a top Iranian official is vowing to support the Lebanese and the U.S. pushes for a cease-fire.

The visit of Ali Larijani, an adviser to Iran’s supreme leader Ali Khamenei, to the Lebanese capital was punctuated with a renewed aerial attack by Israel on the southeastern edge of the city.

The Israeli military pounded Beirut's southern suburbs with airstrikes on Tuesday, mounting one of its heaviest daytime attacks yet on the Hezbollah-controlled area, and struck the middle of the country where more than 20 people were killed.

A senior adviser to Iran's supreme leader Ayatollah Ali Khamenei met Lebanese officials in Beirut Friday, the third high-profile Iranian solidarity visit since the Israel-Hezbollah war began in September.

In addition to supporting Hamas, Iran is a main backer of Hezbollah and for decades has been funding and arming the Lebanese militant group.