ISTANBUL (Reuters) - The cause of a blast near an Istanbul metro station on Tuesday was still unknown and police investigations were underway, a police official told Reuters.
Broadcaster NTV reported the blast at an overpass near the Bayrampasa metro station on the European side of the city may have been caused by a bomb, while Haberturk TV said it was believed to have been triggered by a transformer.
(Reporting by Birsen Altayli; Writing by David Dolan; Editing by Nick Tattersall)
