Ten persons, including two Central Reserve Police Force personnel and four special police officers, were killed on Wednesday in a landmine blast triggered by Naxals in Chhattisgarh's Dantewada district, police said.

The incident took place at Sirguda village in Bastar region under Injram police station area, when Naxals blew up a tractor carrying the special police officers and jawans, Bastar Inspector General A N Upadhyaya told PTI.

Those killed included four civilians. Three SPOs were injured in the Naxal attack, he said.

The injured have been admitted to a nearby hospital in Injram, Upadhyaya said. The blast occurred when a joint patrol team of the CRPF, the district police force and special police officers were returning from their duty in a tractor, along with some civilians, he added.

Additional police forces have been sent to the spot to take stock of the situation, the police officer added.