Forces loyal to Yemen's Ali Abdullah Saleh pound the domestic opposition's stronghold in a main city in the southwest of the country, killing two people and wounding 10 others.
The Republic Guard was apparently targeting tribal chief Hammud Sayed al-Mekhlafi in the city of Taizz's neighborhood of Al-Rawda, AFP reported on Sunday.
Mekhlafi said the attackers had been stationed at the nearby Republic Hospital.
The incident came as Yemenis are continuing with their thousands-strong nationwide rallies, which they launched in January, calling for an end to corruption and unemployment and demanding the ouster of Saleh's regime.
The regime has stiffly responded to the popular revolution, killing hundreds among the protesting public.
Yemen's Ali Abdullah Saleh fled to Saudi Arabia to receive treatment after a June 3 attack on the presidential palace.
Saudi-owned television station Al-Arabiya claims he would return to Yemen on July 17-- the 33rd anniversary of his coming to power.