Rights groups have expressed concern for the large numbers of civilians trapped in the Afghan city of Kunduz, amid fierce fighting between the Taliban and government troops.

The government has accused the Taliban of raping and killing civilians after it seized the northern city this week. The Taliban rejected the accusations.

Both sides are claiming to be in control of much of the city.

But one resident of Kunduz told the BBC that he disputes the government's claims that the city has been retaken, saying he could see no evidence of government troops there.