Israel and Hezbollah exchanged air strikes and rocket fire on Monday as their 60-day ceasefire appeared to be unravelling within its first week.

Hezbollah fired Monday evening at an Israeli Army post in a south Lebanon border area in a first such response to alleged repeated Israeli violations of a cease-fire agreement achieved last week.

The bursts of violence — with no reports of serious casualties — reflected the uneasy nature of the ceasefire that otherwise appeared to hold as Lebanese troops began to deploy in parts of southern Lebanon.