Explosions ripped through Turkey's southeast late Thursday, killing four suspected bomb makers and wounding 17 people.

The first large explosion took place in southeastern Diyarbakır province on late Thursday, with many injuries reported.The number of injuries has not yet been confirmed.The explosion struck a highway near the town of Hani in the neighborhood Kümeevler in Diyarbakır at about 22:30 p.m., wounding several people, security sources said.Many ambulances and security forces were dispatched to the area.

Witnesses reported hearing a loud explosion from miles away.An explosion was also heard in the Sur district of Diyarbakır, reportedly killing four and wounding 17 people.The blast also occurred at about 10:30 p.m. in the Sarıkamış district, about 25 km from the region's biggest city Diyarbakır, as PKK terrorists loaded explosives onto a truck, according to the Interior Ministry.

The blast near Hani and Sur follows a car bomb attack near a military facility earlier in the day in Istanbul that wounded eight people, and another car bombing in Diyarbakır on Wednesday that targeted police and killed three people.