At least 20 people are thought to have been injured after an explosion outside Besiktas's Vodafone Arena in Istanbul.

Early reports suggest that the explosion was caused by a car bomb that targeted a police riot van shortly after the end of a football match.

A number of officers are thought to be amongst those injured by the blast, which came after Besiktas beat Bursaspor 2-1 to move joint top of the Super Lig table.

Ambulances and fire engines were rushed to the scene, while TV footage showed a fire burning outside the stadium.

A second explosion was also reported near a shopping centre in Taksim Square, with police and ambulance services also sent to that location.