There were no immediate reports of casualties.
Hamas and President Mahmoud Abbas's Fatah faction agreed to a ceasefire on May 19 in a bid to end internal bloodshed in which more than 50 Palestinians died earlier in the month.
Hamas and other militant groups have turned their attention instead to rocket attacks against southern Israel, drawing Israeli forces into an air campaign in Gaza that has killed more than 40 Palestinians, mostly fighters.
- Reuters - Thomson Reuters Foundation
- For more humanitarian news and analysis, please visit https://www.trust.org/alertnet