A roadside bomb has exploded in southeastern Turkey, killing five policemen and three civilians including a child, security officials said.

The bomb, placed on a road in the Guroymak district of Turkey's Bitlis province, struck a police vehicle as it returned from a shooting range, officials said.

Five policemen inside the vehicle as well as three civilian bystanders, including a two-year-old girl, were killed by the blast, they said. Three people were being treated for wounds.

Kurdish separatists have carried out a string of attacks in southeastern Turkey in recent months, killing more than 50 Turkish personnel since July. Bitlis is located in the mainly Kurdish southeast of Turkey.