Israeli airstrikes have hit the headquarters of the U.N. peacekeeping force and other positions in south Lebanon in recent days, drawing widespread condemnation from around the world.

United Nations Secretary-General Antonio Guterres warned on Sunday that any attacks against peacekeepers "may constitute a war crime," his spokesperson said after Israeli tanks burst through the gates of a peacekeeping base in southern Lebanon.

The United Nations' peacekeeping force in Lebanon has warned Israel for the fourth time in as many days against "further flagrant violation of international law."