Israel said it struck targets in Lebanon on Monday evening after vowing to retaliate for an attack by Hezbollah on a military post, with both sides accusing each other of violating last week's ceasefire. At least nine people were killed by Israeli strikes on two southern Lebanese villages, according to the country's public health ministry.

The rebel offensive in Syria started after Israel and Hezbollah agreed to a cease-fire in Lebanon, where conflict has weakened key backers of Syria’s government.