DAMASCUS (AFP) - Representatives of Syrias six-month-old protest movement joined opposition parties in Turkey on Saturday to forge a united front against Bashar al-Assads regime after violence claimed at least 21 more lives. Clashes between security forces and deserters killed 11 people in a village in Hama province on Friday, while another eight died during a crackdown on protests in flashpoint Homs, human rights activists said. Two men died on Saturday from their wounds after being shot by security forces at Harasta and Qudsaya near Damascus, the Syrian Observatory for Human Rights said. It also said the body of a third man arrested on Friday at Talbisseh in Homs province was returned to his parents. The Local Coordination Committees group put Fridays death toll at 23. Thousands of protesters had taken to the streets on the Muslim weekly day of prayer, a lightning rod in the protests against President Assad in which the United Nations says 2,700 people have been killed. The protests on Friday were held under the slogan victory for our Syria and our Yemen, scene of another Arab uprising. In Istanbul, the Syrian National Council which is trying to unite opponents to Assads regime was holding negotiations behind closed doors. Several opposition movements are trying to reach an alliance, SNC member Khaled Khoja told AFP.