BEIRUT − Lebanon and the militant group Hezbollah have agreed to a U.S. ceasefire proposal and made some comments on the content, a top Lebanese official told Reuters on Monday, describing the effort as the most serious yet to end weeks of fighting and Israeli bombardments.

Amos Hochstein is expected in Beirut on Tuesday, according to two Lebanese official sources, in a sign of progress in ceasefire negotiations for the deadly cross-border conflict between Israel and Hezbollah in Lebanon.

An Israeli air strike hit a densely-populated neighborhood in the heart of Beirut Sunday evening, killing one person and wounding nine others, according to the Lebanese Health Ministry.