An Israeli raid on a mosque in the Gaza Strip early Sunday morning killed at least 19 people, Palestinian officials said, as Israel intensified its bombing of northern Gaza and southern Beirut in a widening war with armed groups allied with Iran across the region.

Israel is still fighting Hamas a year after the group launched an attack on Israel on October 7, opening a new front in Lebanon against Hezbollah, which has been exchanging fire with Israel along the border since the start of the war in Gaza. Israel vowed to strike Iran itself after Tehran launched a ballistic missile attack on Israel last week.

The widening conflict risks attracting more from the United States, which has provided crucial military and diplomatic support to Israel. Armed groups allied with Iran in Syria, Iraq and Yemen have already joined long-range strikes on Israel.

A stabbing and shooting attack at the central bus station in the city of Beersheba in southern Israel left one person dead and 10 others injured, according to paramedics. Police did not identify the attacker, but said they were treating the incident as a terrorist attack.

The attack came as Israel stands on high alert ahead of commemorative events marking the October 7 attack, which unleashed a year of violent escalation across the region.

The Israeli army announced a new air and ground attack on Jabalia in northern Gaza, where there is a densely populated camp dating back to the 1948 war that followed Israel’s founding. Pictures and video clips were circulated showing a column of tanks heading towards the area.