BAGHDAD (AP) — Iraqi security forces and Shiite militiamen on Sunday broke a six-week siege imposed by the Islamic State extremist group on the northern Shiite Turkmen town of Amirli, as a suicide bombing killed 14 people in Anbar western province, officials said.
Army spokesman Lt. Gen. Qassim al-Moussawi said the operation started at dawn Sunday and the forces entered the town shortly after midday.
Speaking live on state TV, al-Moussawi said the forces suffered ‘‘some causalities,’’ but did not give a specific number. He said fighting was ‘‘still ongoing to clear the surrounding villages.’’
Breaking the siege was a ‘‘big achievement and an important victory’’ he said, for all involved: the Iraqi army, elite troops, Kurdish fighters and Shiite militias.
Turkmen lawmaker Fawzi Akram al-Tarzi said they entered the town from two directions and were distributing aid to residents.
About 15,000 Shiite Turkmens were stranded in the farming community, some 105 miles (170 kilometers) north of Baghdad. Instead of fleeing in the face of the Islamic State group’s rampage across northern Iraq in June, the Shiite Turkmens stayed and fortified their town with trenches and armed positions.
Residents succeeded in fending off the initial attack in June, but Amirli has been surrounded by the militants since mid-July. Many residents said the Iraqi military’s efforts to fly in food, water and other aid had not been enough, as they endured the oppressive August heat with virtually no electricity or running water.
Nihad al-Bayati, who had taken up arms with fellow residents to defend the town, said some army units had already entered while the Shiite militiamen were stationed in the outskirts. He said residents had fired into the air to celebrate the arrival of the troops.
‘‘We thank God for this victory over terrorists,’’ al-Bayati told The Associated Press by phone from the outskirts of Amirli. ‘‘The people of Amirli are very happy to see that their ordeal is over and that the terrorists are being defeated by Iraqi forces. It is a great day in our life.’’
State TV stopped regular programs and started airing patriotic songs following the victory announcement, praising the country’s security forces. They have been fighting the militants for weeks without achieving significant progress on the ground.
On Saturday, the U.S. conducted airstrikes against the Sunni militants and air-dropped humanitarian aid to residents. Aircraft from Australia, France and Britain joined the U.S. in the aid drop, which came after a request from the Iraqi government.
The Pentagon’s press secretary, Rear Adm. John Kirby, said military operations would be limited in scope and duration as needed to address the humanitarian crisis in Amirli and protect the civilians trapped in the town.
The Islamic State extremist group has seized cities, towns and vast tracts of land in northeastern Syria and northern and western Iraq. It views Shiites as apostates and has carried out a number of massacres and beheadings — often posting grisly videos and photos of the atrocities online.
The U.S. started launching airstrikes against the Islamic State extremist group earlier this month to prevent the insurgents from advancing on the Kurdish regional capital Irbil and to help protect members of the Yazidi religious minority stranded on Mount Sinjar, in Iraq’s northwest, where U.S. planes also dropped humanitarian aid.
The U.S. also launched airstrikes near Mosul Dam — the largest in Iraq — allowing Iraqi and Kurdish forces to retake the facility, which had been captured by Islamic State fighters.
Earlier Saturday, the U.S. Central Command said five more airstrikes had targeted Islamic State militants near Mosul Dam. Those attacks, carried out by fighter aircraft and unmanned drones, brought to 115 the total number of airstrikes across Iraq since Aug. 8.
On Sunday night, police officials said a suicide driver rammed an explosives-laden car into a police checkpoint in Ramadi city, killing 14 people, including nine policemen. About 27 people were also wounded in the attack.
Ramadi, the provincial capital of Anbar province, is 115 kilometers (70 miles) west of Baghdad.
Hospital officials confirmed the casualties. All officials spoke on condition of anonymity because they were not authorized to speak to the media.
Associated Press writer Sinan Salaheddin contributed from Baghdad.