A suicide bomber drove his explosives-laden car into a checkpoint manned by Shi'ite Muslim fighters in northern Yemen on Friday, local officials and tribal sources said.
They could not immediately tell the number of the casualties but said there were killed and wounded people in the attack, which took place in al Jawf province.
Both Shi'ite Houthis and Sunni Muslim al Qaeda militants have a strong presence in the province some 140 km (90 miles) northeast of the capital Sanaa. Yemen's widespread disorder has posed a threat to oil exporting giant Saudi Arabia next door.