At least 20 people have been wounded by a car bomb attack on police in the Turkish city of Istanbul, Turkey's interior minister has confirmed.
The explosion took place outside the Vodaphone Arena stadium of Besiktas football club, where a game against Bursaspor took place earlier today.
Officials said those injured were police officers after the bomb exploded next to a police bus.
Witnesses reported hearing two explosions followed by heavy gunfire.
Pictures from the scene showed smoke rising over the city and eyewitnesses reported hearing sirens as police rushed to cordon off the bomb site.
Turkey's Interior Minister, Suleyman Solu, confirmed an attack had taken place.
He told the state-run Anadolu Agency: "It is thought to be a car bomb at a point where our special forces police were located, right after the match at the exit where Bursaspor fans exited, after the fans had left.
"We have no information on the number of dead. God willing we hope there won't be any. The wounded are police."
Eyewitnesses said they heard two explosions and saw many injured riot police officers.
Omer Yilmiz, who works as a cleaner at a nearby mosque, told Reuters: "It was like hell. The flames went all the way up to the sky.
"I was drinking tea at the cafe next to the mosque.People ducked under the tables, women began crying. Football fans drinking tea at the cafe sought shelter, it was horrible."
It comes two months after a bomb exploded outside an Istanbul police station, injuring at least ten people. In June, a bomb targeting a police bus killed 12 people and injured 51, while three weeks later gunmen killed 45 people at the city's Ataturk Airport.
