Azerbaijan , Baku, Sept. 21 / Trend A. Isgandarov /
Fresh fighting has broken out in the Yemeni capital of Sanaa despite a ceasefire agreed overnight aimed at ending days of violence, BBC reported.
Artillery fire and shelling shook at least two areas of the city as security forces and opposition groups clashed, reports say.
Late on Tuesday, the vice-president agreed a truce following negotiations with western envoys.
Dozens of people, many unarmed protesters, have died since Sunday.
The fighting died down on Tuesday night after the defence ministry said Vice-President Abedrabbo Mansour Hadi had given "strict orders for a rapid ceasefire in the capital" which government troops were obeying.
The past three days have been the deadliest since demonstrations against President Ali Abdullah Saleh first erupted in January.
Since February, millions of Yemenis have been demanding the ouster of Saleh, who has been in power for 32 years. Yemeni security forces use their weapons to disperse the anti-government actions. According to Western media, for two months the popular unrests in the country killed several hundreds people.
Despite months of protests, Saleh, who has been receiving treatment in neighbouring Saudi Arabia for the past three months for blast wounds he sustained in a bombing at the presidential palace, has so far refused to hand power to his deputy.