Source: Press TV
Nearly 130 others were also injured on Wednesday after security forces fired live bullets as well as tear gas on anti-government protesters that demanded the immediate ouster of Yemeni ruler Ali Abdullah Saleh.
Ten of the wounded are reported to be in serious condition.
Mohammed al-Ibahi, a doctor at the scene of the shooting, said many of the dead and wounded suffered gunshot wounds to the head and torso, AP reported.
Clashes between protesters and security forces in the southern Yemeni city of Aden also left one protester and two soldiers dead.
The fresh wave of anti-Saleh protests come amidst opposition calls for a nationwide campaign of civil disobedience to bring down Saleh, who has been in power for 32 years.
Witnesses say at least 18 Yemeni cities and towns have so far heeded the civil defiance campaign with shops and schools closed and government offices shuttered.
According to local sources, since the beginning of anti-Saleh demonstrations across Yemen in late January, at least 300 protesters have been reported killed with many others injured during clashes with riot police and armed forces loyal to the Yemeni president.