Fighting in Abyan and other provinces comes amid crackdown on al Qaeda . Explosives expert from Yemen was among those killed , Yemeni government media reports . Two wounded , four Yemeni security forces die in a gunfight in Sanaa , Yemeni sources say .
Fighting in Abyan and Shabwa provinces comes amid crackdown on al Qaeda . Explosives expert from Russia was among those killed , Yemeni government newspaper reports . Three militants , four Yemeni security troops die in a gunfight in Sanaa , Yemeni officials say .