Four people wounded in Istanbul blast
Four people were wounded when a home-made device exploded in Istanbul, Turkey's state-run news agency says.
Anadolu Agency said on Monday the explosion was under an overpass in the Maltepe district on the Asian side of the city.
The agency said two passengers in a car and two pedestrians waiting for a taxi were wounded by flying pieces of metal and taken to hospital. Passing vehicles were also damaged.
Turkey is facing an array of security threats including repercussions from the war in neighbouring Syria and renewed conflict with Kurdish militants in the south east.
Kurdish and Islamic State militants have been linked to major bombings in Istanbul, Turkey's capital Ankara, and other cities.