(AFP) -- Iraqi forces on Friday entered Al-Qaim, the main town in ISIS's last bastion in the country, military commanders said.
Early Friday morning, Iraqi forces unleashed a barrage of artillery fire against militant positions inside the town, backed by Iraqi and US-led coalition air strikes.
Troops from the army and the elite Counter Terrorism Service "have started the assault on the center of Al-Qaim," Staff Major General Noman Abed al-Zobai, the commander of the 7th Division, told AFP from the scene.
Shortly afterwards, another officer said on condition of anonymity that the town's Gaza district had fallen from militant hands.
"Counter Terrorism Service units and tribal fighters have liberated Gaza after violent clashes, leaving some terrorists dead, while others withdrew towards the center of Al-Qaim," he said.
The paramilitary Hashed al-Shaabi (Popular Mobilisation) force said in a statement that militants had set fire to civilians' houses in the southwestern neighborhood to make it hard to see them from the air.
Government forces launched the operation last week to seize Al-Qaim and its surroundings, a pocket of barren desert along the Euphrates river near the border with Syria.
Home to around 150,000 people, it is the last Iraqi remnant of ISIS. The US-led coalition has said around 1,500 ISIS fighters are left in the area, which it expects to be the scene of the "last big fight" against the group in Iraq.
ISIS is also under pressure from separate offensives by Syrian regime and US-backed forces in the neighboring Syrian province of Deir Ezzor.
The Hashed said Friday several ISIS fighters had fled across the border towards the Syrian town of Albu Kamal.