At least seven soldiers have been killed in the eastern Turkish city of Tunceli after a vehicle laden with explosives was detonated as a military vehicle carrying the soldiers was passing, security sources said.

Turkish television footage on Tuesday showed two vehicles in flames on what appeared to be a thinly-populated road connecting two districts of the city.

Al Jazeera's Elif Ural, reporting from Diyarbakir, said that so far nobody had claimed responsibility for the attack.

"The govenors office said that they are still collecting information and will let us know in the coming hours," she said.

"The only confirmation we have, is that a military vehicle was hit and at least seven soldiers were killed and many others injured."

There are reports that the target was a military vehicle.

The cause is not yet known, but there has been heavy fighting in recent days between Kurdish rebels and the Turkish military.

Source: Al Jazeera and agencies