DAMASCUS (AFP) - Syrian President Bashar al-Assad's forces killed two more protesters on Saturday, as close ally Iran said his government should recognise "legitimate" popular demands and warned of an unpredictable regional vacuum if the regime falls. Meanwhile, an Arab diplomat said Arab foreign ministers meeting in Cairo on Saturday would tell Syria they will no longer be silent on its crackdown against protesters, but would not suspend its Arab League membership. Authorities, in a statement carried by SANA news agency, warned protestors to stay away from demonstrations in the main streets of the capital being called for on Facebook. "The interior ministry asks citizens not to respond to calls on social networks to take part in demonstrations and gatherings in the principal squares of Damascus, for their own safety," it said. In the latest bloodletting, one demonstrator was killed and 10 hurt when club-wielding security forces attacked a group of people leaving prayers at the Rifai mosque in the capital's western quarter of Kafar Susseh, the Syrian Observatory for Human Rights said. Among the wounded was the imam of the mosque, Osama al-Rifai. The Local Coordination Committees, which groups activists on the ground, confirmed the death, but said 12 people had been injured. Demonstrations were also reported in the northern Damascus quarter of Roukn Edinne and in Zabadani, 45 kilometres (28 miles) north of the capital, the Observatory said. Separately, the Observatory said one person was killed and five wounded in Kafar Nabel, in Idlib province of northwest Syria. On Friday, the last during the holy month of Ramazan, security forces killed at least seven people as they fired on protesters rallying in their tens of thousands across Syria and vowing to bring down the regime. An eighth man died in detention, his family told rights groups. Spurred by calls posted on the Internet, protesters flooded the streets in the north, centre and south of the country, chanting "Bashar, we don't love you, even if you turn night into day," according to activists. In the latest call for Assad to pay heed, Iran called on his government to listen to its people. "The government should answer to the demands of its people, be it Syria Yemen or other countries," Iranian Foreign Minister Ali Akbar Salehi said in Tehran. "The people of these nations have legitimate demands and the governments should reply to these demands as soon as possible," the ISNA news agency quoted him as saying.