"Kunduz city has collapsed into the hands of the Taliban," Interior Ministry spokesman Sediq Sediqqi told the Associated Press.
The fall of Kunduz marks a major setback for government forces, who have struggled to combat the Taliban since the U.S. and NATO shifted to a supporting role at the end of last year.
Military reinforcements have been sent to Kunduz, where government forces managed to fend off a major Taliban assault earlier this year. "We are trying our best to clear the city as soon as possible," Sediqqi said.