Six shells were fired from Lebanon towards northern Israel on Monday but fell short of crossing the border, the Israeli military said, APA reports quoting Reuters.
It said that in response, artillery was fired at "the sources of the launches" in Lebanon.
A Lebanese security source said shells were heard being fired from south Lebanon and efforts were being made to identify the location. The source said about 22 shells were fired by Israeli artillery on Lebanese territory.
The United Nations Interim Force in Lebanon said it had detected rocket fire from around Rashaya Al Foukhar in southern Lebanon.