The Lebanese army has intensified its shelling of Fatah al-Islam positions inside the Nahr al-Bared Palestinian refugee camp near the northern city of Tripoli.
The artillery and tank shelling, the heaviest in recent days, began again at dawn on Wednesday, following intermittent fighting during the night.
Two soldiers were killed in military operations on Tuesday, a senior military official said.
More than 200 people, including 118 soldiers, have died since fighting first broke out in Tripoli and at the camp on May 20, according to the army.
The shelling follows days of low intensity fighting, with soldiers continuing to push further into the camp.
Almost all of the camp's 31,000 residents have been evacuated.
Rocket attack
Fatah al-Islam has also recently fired two Katyusha rockets on nearby villages, killing a Lebanese teenager and injuring a young girl.
Throughout last week, the army used loudspeakers to urge the fighters to surrender or allow their families to leave the camp.
But, around 20 women and 45 children have stayed back.
Abu Salim Taha, a spokesman for the group, has also warned they would send suicide bombers against the army if it continued its offensive.