In this photograph released by Medecins Sans Frontieres (MSF) yesterday, fires burn in part of the MSF hospital in the Afghan city of Kunduz after it was hit by an air strike. AFP

Reuters/Kabul

Medical aid group Medecins Sans Frontieres denied that Taliban fighters were firing from its hospital at Afghan and NATO forces  before a suspected US air strike killed at least 19 people in a battle to oust the Islamist insurgents from an Afghan city.

Fighting raged around the northern provincial capital of Kunduz for a seventh day as government forces backed by American air power seek to drive out Taliban militants who seized the city almost a week ago.

Decomposing bodies littered the streets and residents said that food was scarce.

MSF has said an air strike, probably carried out by US-led coalition forces, killed 19 staff and patients on Saturday in a hospital it runs in Kunduz, leaving 37 wounded.

The US military said it conducted an air strike "in the vicinity" of the hospital, as it targeted Taliban insurgents who were directly firing on US military personnel.

The US-led coalition force in Afghanistan said it expected to complete a preliminary multi-national investigation in days into whether an air strike it conducted hit the hospital.

The bombing deals a blow to Afghan President Ashraf Ghani's policy of forging closer ties with the United States after his predecessor Hamid Karzai fell out with his backers in Washington in part over the number of civilians killed by bombs.

But the Afghan leader will be torn between distancing himself from Washington and the need for American firepower to help his forces drive insurgents out of Kunduz after the Taliban's biggest victory in the nearly 14-year-old war.

President Barack Obama said the defense department had ordered a full investigation and he offered condolences to the victims of what he called "the tragic incident". The U.N. human rights chief said the hospital assault was "inexcusable" and could amount to a war crime.

In Kabul, the Afghan Ministry of Defence said Taliban fighters had attacked the hospital and were using the building "as a human shield".

But the medical aid group denied this.

"The gates of the hospital compound were closed all night so no one that is not staff, a patient or a caretaker was inside the hospital when the bombing happened," Medecins Sans Frontieres said in a statement on Sunday. "In any case, bombing a fully functioning hospital can never be justified."

Staff pulled out

Witnesses said patients were burned alive in the crowded hospital after the air strike. Among the dead were three children being treated.

MSF said on Sunday it had pulled most of its staff out of the area because the hospital that was a lifeline for thousands in the city was no longer functioning. Some staff had gone to help treat the wounded at other hospitals outside of Kunduz.

Earlier this year, an Afghan special forces raid in search of a suspected al Qaeda operative prompted the hospital to temporarily close to new patients after the soldiers were accused of behaving violently towards staff.

The struggle to retake Kunduz has raised questions over whether NATO-trained Afghan forces were ready to go it alone now most foreign combat troops have left.

Afghan security forces were conducting house-to-house searches on Sunday, as gunbattles persisted in parts of the city, said Hamdullah Danishi, acting governor of Kunduz province. He said 480 Taliban fighters and 35 soldiers had been killed.

The army raised the national flag in the central square, an area of the city that has changed hands several times in the fighting during the last week.

"Our security forces took control of strategic areas in Kunduz," Danishi  said. "We have a clearance operation ongoing."

Afghan military helicopters on Sunday dropped 6,000 leaflets urging people to cooperate with the army, the defence ministry said.

"If you see abandoned military vehicles or equipment anywhere turn them over to security forces," the leaflets read.

Corpses lay in the streets and people were too afraid to leave their homes, said one resident, Gulboddin.

"You can hear the sound of gunfire all over the city," said Gulboddin, who has only one name. "Some of the bodies are decomposing." 

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