DAMASCUS (AFP) - Army defectors killed at least 27 soldiers and security service agents south of Damascus on Thursday in the third straight day of regime losses as the uprising in Syria entered its 10th month. The clashes in Daraa province where protests against Bashar al-Assad's regime first erupted in mid-March came as Human Rights Watch said that half of the more than 60 rebel soldiers it interviewed for a new report said they had mutinied after receiving direct orders to shoot on civilians. Burhan Ghaliun, head of the Syrian National Council (SNC), the country's most representative opposition grouping, said he hoped it would not be long before the UN Security Council took action after UN chief Ban Ki-moon urged world powers to act "in the name of humanity." Thursday's fighting broke out at dawn at checkpoints in three separate places in Daraa province, the Britain-based Syrian Observatory for Human Rights said in a statement sent to AFP in Nicosia. The clashes came after army defectors killed at least eight loyalist troops on Wednesday and seven on Tuesday as they stepped up attacks that they have said were reprisals for security force attacks on civilians. Human Rights Watch named 74 military and intelligence officers "who allegedly ordered, authorised, or condoned widespread killings, torture, and unlawful arrests" in its report entitled: "By All Means Necessary." "Defectors gave us names, ranks, and positions of those who gave the orders to shoot and kill," said Anna Neistat, the New York-based watchdog's associate director for emergencies. "Each and every official named in this report, up to the very highest levels of the Syrian government, should answer for their crimes against the Syrian people", Neistat said, urging the UN Security Council to refer the case to the International Criminal Court. Because Syria is not an ICC member, the court can only intervene after a Security Council referral, a move that would be subject to a veto by permanent members China and Damascus ally Russia. Russia, which along with China blocked a resolution condemning Assad in October, said this week the West is pursuing an agenda of "regime change" by putting pressure on Damascus but not on armed groups. The US State Department's special coordinator on Middle East affairs, Frederic Hof, said on Wednesday that it was vital that Moscow and Beijing change their stance. A group claiming to represent the majority of the opposition movements inside Syria declared Thursday the foundation of a "National Alliance" of revolutionary forces aiming to topple the regime. "The regime has killed, maimed, arrested, tortured and displaced tens of thousands of people," Mohammed Bessam Imadi, a former Syrian ambassador to Sweden, told a press conference in Istanbul. "Therefore different revolutionary groups sought to unify their operational and political leadership to join forces and overthrow the regime," added Imadi, who described himself as head of the alliance.