Lebanon’s state news agency has reported that Israeli shelling has killed three people in south Lebanon as the collapse of a temporary truce between Israel and Hamas has prompted a resumption of hostilities at the frontier, Reuters reports.

The Iran-backed Lebanese group Hezbollah, a Hamas ally, later said one of its fighters was among those killed. It also said it had carried out several attacks on Israeli military positions at the border in support of Palestinians in Gaza.

The Israeli army said its artillery struck sources of fire from Lebanon and air defences had intercepted two launches. The army also said it struck a “terrorist cell”. Sirens warning of possible incoming rockets sounded in several towns in northern Israel, sending residents running for shelter.

Lebanon’s state news agency reported that two people were killed by Israeli shelling in the Lebanese border town of Houla, and one person was killed in the village of Jebbayn.

Israeli shelling killed a woman and her 35-year-old son in Houla, Shakeeb Koteich, the head of the town’s municipal council, told Reuters, saying both were civilians. Hezbollah later said a “martyr” was killed in Houla.

“A shell landed near the house, and then a second one hit the house,” Koteich said by telephone.