A powerful explosion has rocked the eastern Turkish city of Tunceli, killing seven people, media report.
On Tuesday, the blast targeted a military vehicle carrying security personnel.
The city is near the country's Kurdish area and suspicion will automatically fall upon Kurdish rebel group the PKK, says the BBC's Istanbul correspondent James Reynolds.
Fighting between Turkish troops and the PKK -- the Kurdistan Workers' Party -- has escalated in recent months.
Turkish TV stations showed shaky footage of workers trying to put out fires in two burnt-out vehicles.
Reports said the vehicles were blown up by remote detonation.
Several ambulances and fire engines were reported speeding to the scene in the Ataturk neighborhood of the city.
There was no immediate claim of responsibility, but this apparent attack comes amid a surge in fighting in the three-decade conflict between the military and the PKK which in total has killed more than 40,000 people.
PKK fighters killed 17 Turkish soldiers and injured scores over three days in Bingol province last week.
Meanwhile, Turkish fighter jets and attack helicopters have been pounding suspected PKK camps on either side of the border with Iraq over the last year, killing hundreds.
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