Three Palestinian refugees were killed in Syria on Monday during clashes between the Free Syrian Army and government forces, a local group said. The Workforce for Palestinians in Syria said in a statement that Luay Majid Suwwan, a member of the Syria-based Palestine Liberation Army, was killed during clashes. Another man, Ahmad Awad, was shot dead by a sniper at a checkpoint manned by Syrian government forces while protesting the army\'s siege on Yarmouk camp, the group said. Aisha Lafi was killed by shrapnel from a shell which landed near her home in the Damascus area. The group said that Palestinian refugees in al-Aedin camp near Homs had appealed to both sided of the conflict to respect the neutrality of Palestinian refugees. Syrian military forces detained Husam Ahmad Othman, from al-Aedin camp, on Sunday at an army checkpoint, the group added. The Syrian army has imposed a blockade on Yarmouk refugee camp for over 80 days and there has been no electricity or fuel in the camp for months. At least 1,500 Palestinians have been killed in the ongoing Syria conflict. Some 250,000 Palestinian refugees have been forced to leave their refugee camps in Syria due to violence in the country. A staggering 6.2 million Syrians have been torn from their homes -- a number without parallel in any other country and representing nearly a third of Syria\'s pre-war population of 20.8 million.