The hardline Islamists hoisted their flag over the main square of the northeastern city of Kunduz, witnesses said, after 2,000 of their fighters took the city, offering a potentially powerful image in a country that laboured under their rule until 2001.
"Half the city has fallen into the hands of Taliban insurgents," Sayed Sarwar Hussaini, police spokesman for the northeastern Kunduz province, told a news conference, adding local forces had not yet received promised external support.
He added that the local headquarters of the National Directorate of Security, the country's main intelligence agency, had been set on fire, and prisoners had been released from the city jail.
"Only the police headquarters is now resisting," he said.
This was the group's third attempt to breach the city after failures in April and June.
An AFP reporter in the city said it was swarming with Taliban fighters who were racing police vehicles and had raised the flag of the Islamic Emirate of Afghanistan (the group's official name) over the homes of government officials.
The Islamist group has been largely absent from cities since being driven from power by the US and its allies, but has maintained often-brutal rule over swathes of the countryside.
A senior tribal elder in Kunduz, 250 kilometres north of Kabul, said the militia had control of one of the city's districts, while a second elder added his house was now around 100 metres from their forward line.
Federal government officials had earlier issued strong denials that the Taliban had breached the city, insisting they were repelling the insurgents on the city's outskirts.
The Taliban have been waging a bloody insurgency since a US-led invasion booted them from power in late 2001, and have stepped up attacks during a summer offensive launched in late April against the Western-backed government in Kabul.
Yesterday 13 people were killed and 33 wounded at a volleyball match in the eastern province of Paktika.
