At least 20 people have been injured in a blast outside Besiktas stadium in Istanbul, according to Turkey's Interior Minister Suleyman Soylu, cited by Reuters.

The explosion killed at least 13 people, Reuters reported, citing security sources. Meanwhile Al Jazeera reported at least 15 casualties.

The blast likely targeted a riot police bus, the minister said.

"Approximately 20 injured in car bomb attack that happened where our riot police officers had been stationed," Interior Minister Suleyman Soylu told journalists. https://www.rt.com/news/369901-besiktas-stadium-istanbul-explosion/