Activists: Assad forces kill 13 during Friday prayers across Syria
Turkish President Abdullah Gul warns Assad not to leave reforms until it is too late; U.S. calls for countries to stop buying Syrian oil; Switzerland's Vitol, Trafigura supply fuel to Syria.
Syrian security forces shot dead ten protesters during attacks on pro-democracy demonstrations across the country on Friday, and fired live ammunition at protesters coming out of a main mosque in the besieged city of Deir al-Zor, activists and witnesses said.
The Local Coordination Committees activists' group said it had the names of two protesters killed in Syria's commercial hub of Aleppo, one in the city of Homs, three in suburbs of the capital Damascus and two in the northwestern province of Idlib on the border with Turkey.
"Military intelligence directed their AK-47s at the mosque, hitting the main air-conditioning unit, which caught fire. The whole neighborhood is echoing with the sound of bullets," said one witness, an engineer who lives near Harwil Mosque.
"Worshippers are running to take cover in alleyways," he said by phone.
A resident of Hama also said protesters came under fire in the central Syrian city. Hama was stormed by the army at the start of the month in an assault which killed more than 100 people, according to activists and rights groups.
British-based activist Rami Abdel Rahman also reported clashes in Hama and said tens of thousands of people were protesting in the city of Homs.
"We will only kneel to God!" chanted protesters.
Syrian authorities have barred most independent media, making it difficult to verify events on the ground in the unrest, among a series of popular revolts against repressive power elites across the Arab world this year.
President Bashar Assad's forces have intensified assaults on towns and cities across the country since the start of the Muslim fasting month of Ramadan to try to subdue mounting dissent against the ruling family, despite threats of new U.S. sanctions and calls from Turkey and Arab nations to end attacks on dissenting civilians.
Activists said at least 19 people were killed by Syrian forces in raids near the Lebanon border and in the country's Sunni Muslim tribal heartland on Thursday. Assad's family belongs to the minority Alawite sect that dominates Syria.
They say more than 1,700 civilians in all have been killed in the military crackdown on protests against Assad which broke out in March. Syria blames the violence on armed groups, who it says have killed 500 soldiers and police.
Another resident of Deir al-Zor said: "Assad wants to finish off the uprising before international pressure is becoming too much for him. But people have gone out of almost every major mosque in Deir al-Zor, metres away from tanks that occupy every main square and roundabout."
U.S. calls for countries to stop buying Syrian oil
U.S. Secretary of State Hillary Clinton said sanctions against Syria's vital oil and gas industry were needed to put pressure on Assad. She called on Europe and China, main foreign players in Syria's energy sector along with Russia, to do more in imposing sanctions on Syria.
Clinton, in a CBS interview, also said an organized, united opposition was needed in Syria.
Syria's oil industry, with which the ruling family has close links, generates most of the state's hard currency from crude output of 380,000 barrels per day.
The global campaign group Avaaz urged European nations on Friday to impose immediate restrictions on purchases of Syrian oil to "dry up" funding of Assad's security services. It said over 150,000 Avaaz members had signed a petition to that effect.
But there is little prospect of Western states putting teeth into the sanctions on Assad by targeting Syria's oil because of vested commercial interests against doing so.
U.S. Secretary of State Hillary Clinton said on Friday Syria clearly would be better off without Assad and called on nations that buy oil or sell arms to Syria to cut those ties.
"We urge those countries still buying Syrian oil and gas, those countries still sending Assad weapons, those countries whose political and economic support give him comfort in his brutality, to get on the right side of history," she told reporters after a meeting with Norwegian Foreign Minister Jonas Gahr Store.
"President Assad has lost the legitimacy to lead and it is clear that Syria would be better off without him," she added, echoing previous comments by the Obama administration.
Clinton's comment came the same day dealers revealed that Swiss oil traders Vitol and
Trafigura are supplying fuel to Syria, despite Assad's bloody crackdown against protesters.
Sytrol, Syria's state-owned oil company, agreed to buy two 30,000 tonne cargoes of gasoline, one apiece from Vitol and Trafigura, in a tender on the oil market that closed this week, several trading sources with knowledge of the deals said.
The two trading houses did not respond to requests for comment.
At current market prices the oil will cost Syria about $60 million.
It is not known yet where Vitol and Trafigura will source the gasoline, but it is likely to come from Mediterranean refineries in Italy, France or Spain.
The two privately held trading firms are among the richest of global oil dealers, Vitol with 2010 annual turnover of $195 billion and Trafigura with an estimated $79 billion.
On Wednesday Washington imposed sanctions on Syria's largest bank and its biggest mobile telephone company, controlled by Assad's cousin Rami Makhlouf. The next day U.S. ambassador to Damascus Robert Ford said more sanctions would follow if the Syrian authorities did not halt the violence.
In addition to the Friday protests, nightly Ramadan prayers, or "tarawih", which follow the breaking of the fast, have given more Syrians a focus for daily protest marches against 41 years of Assad family supremacy.
Regional powers mount pressure on Assad
Regional powers Turkey, Saudi Arabia and Egypt have all applied pressure on Assad to stop the violence.
Turkish President Abdullah Gul warned Assad not to leave reforms until it is too late in a letter delivered to the Syrian president earlier this week, Turkey's state-run Anatolian news agency reported on Friday.
U.S. President Barack Obama and Turkish Prime Minister Tayyip Erdogan spoke on Thursday and agreed Syrians' demands for a transition to democracy must be met, the White House said.
Diplomats in New York quoted United Nations deputy political affairs chief Oscar Fernandez-Taranco as saying on Wednesday that nearly 2,000 Syrian civilians had been killed since March - 188 since July 31 and 87 on Aug. 8 alone.
Syria says 500 soldiers and police have died in the bloodshed, which it blames on armed gangs and terrorists.