( CNN ) -- Yemen 's main opposition bloc on Monday rejected President Ali Abdullah Saleh 's call to form a unity government to rule until elections to replace him , saying its goal is simply `` the fall of the regime . '' `` The opposition will not enter a unity government with the ruling party and will stand with the demands of the people , '' said Mohammed Al-Qubati , the spokesman for the Joint Meeting Parties . Saleh is under increasing pressure to resign from youth groups , opposition leaders and even members of his own powerful tribal group , all of whom have called for demonstrations Tuesday against his continued rule . Saleh met Monday with Muslim scholars and members of opposition groups to discuss the possibility of forming a coaltion government that would rule until elections to replace him , according to two Yemeni government sources . But the sources said no agreement had been reached and none was expected on Monday . On Saturday , leaders of two prominent tribal groups , the Hashid-dominated National Solidarity Council and the Baqil tribe , said they would send members to join the protests calling for Saleh 's resignation . Saleh is a member of the Hashid tribe . A day later , the Joint Meeting Parties called for demonstrations on Tuesday . That 's the first time it has called on its supporters to take to the streets since February 3 , which had been branded a day of rage -- a common term for the mass protests that have spread across the Middle East and parts of Africa . Opposition to Saleh has solidified in the wake of violent confrontations between security forces and protesters on Friday , when thousands of anti-government protesters demonstrated in Sanaa , Aden and elsewhere . The clashes left four people dead and 26 wounded , according to medical officials . Amnesty International said it had reports that 11 people died in Friday 's protest , bringing the overall death toll since protests began to 27 . On Tuesday , Interior Minister Mutahar al-Masri said that three members of security forces died and 10 were wounded in recent protests , according to the official Saba news agency . Saba , citing an unnamed security source , has previously said the government denied shooting protesters . Saleh did not appear to be wavering in his intention to remain in office . He spoke to military leaders Saturday , saying there was a plot against Yemeni unity and saying protesters in Aden were causing damage out of `` selfishness . '' Saleh has ruled Yemen since 1978 and has promised not to run for re-election in the next round , but protesters have increasingly argued that nothing less than his resignation will be acceptable to them . The country has been roiled by a Shiite Muslim uprising , a U.S.-aided crackdown on al Qaeda operatives and a looming shortage of water . High unemployment fuels much of the anger among a growing young population steeped in poverty . The protesters also cite government corruption and a lack of political freedom . Journalist Hakim Almasmari contributed to this report .
NEW : three security officers killed in recent protests , official news agency reports . Aden 's main opposition bloc rejects calls for a unity government . President Saleh has called for a coalition government to end protests . Opposition groups are calling for demonstrations against Ali Abdullah Saleh 's rule on Saturday .