BEIRUT, Lebanon — Secretary of State Hillary Rodham Clinton proposed an international coalition to support Syria's opposition Sunday after Russia and China blocked a U.N. attempt to end nearly 11 months of bloodshed, raising fears that violence will escalate.
Rebel soldiers said force was now the only way to oust President Bashar Assad, while the regime vowed to press its military crackdown.
The threat of both sides turning to greater force after Russia and China vetoed a U.N. Security Council resolution raises the potential for Syria's turmoil to move into a more dangerous new phase that could degenerate into outright civil war.
The uprising inspired by other Arab Spring revolts began in March with peaceful protests against Assad's regime, sparking a fierce crackdown by government forces. Soldiers who defected to join the uprising later began to protect protesters from attacks. In recent months, the rebel soldiers, known as the Free Syrian Army, have grown bolder, attacking regime troops.
More than 5,400 people have been killed since March, according to the United Nations, and now regime opponents fear that Assad will be emboldened by the feeling he is protected by his top ally Moscow and unleash even greater violence to crush protesters. If the opposition turns overtly to armed resistance, the result could be a dramatic increase in bloodshed.
At least 30 civilians were killed Sunday, including five children and a woman who was hit by a bullet while standing on her balcony as troops fired on protesters in a Damascus suburb, according to the Britain-based Syrian Observatory for Human Rights, an activist group.
The commander of the Free Syrian Army told the Associated Press that, after the vetoes at the United Nations, "there is no other road" except military action to topple Assad.
"We consider that Syria is occupied by a criminal gang, and we must liberate the country from this gang," Col. Riad al-Asaad said, speaking by telephone from Turkey.
Clinton warned that chances for "a brutal civil war" would increase as Syrians under attack from their government move to defend themselves, unless international steps provide another way.
Speaking to reporters in the Bulgarian capital of Sofia, she called the double veto on Saturday "a travesty."
"Faced with a neutered Security Council, we have to redouble our efforts outside of the United Nations," she said, calling for "friends of democratic Syria" to unite and "support the Syrian people's right to have a better future."
The call points to the formation of a formal group of like-minded nations to coordinate assistance to the Syrian opposition, similar but not identical to the Contact Group on Libya, which oversaw international help for opponents of the late deposed Libyan leader Moammar Gadhafi.
U.S. officials said an alliance would work to further squeeze the Assad regime by stepping up sanctions, bringing disparate Syrian opposition groups inside and outside the country together, providing humanitarian relief for embattled Syrian communities and working to prevent an escalation of violence by monitoring arms sales.
The Syrian state-run newspaper Tishreen vowed that Damascus will press its crackdown aiming to restore "stability and security and confront all forms of terrorism." The regime has portrayed the uprising as the work of terrorists and armed gangs as part of a foreign conspiracy.