Greek Prime Minister Alexis Tsipras won backing from lawmakers on Saturday for painful reform proposals aimed at obtaining a new international bailout, but he faced a rebellion in his own party that could threaten his majority in parliament. The measures, which received an initial nod from European Union and International Monetary Fund officials before a meeting of euro zone finance ministers on Saturday, were passed with the support of pro-European opposition parties, Reuters reported. With Greece's banks shut and completely dependent on a credit lifeline from the European Central Bank, the measures were seen as a last chance to avert the collapse of the financial system and prevent Greece from being pushed out of the euro. In an ominous sign for the stability of the government, however, 10 deputies on the ruling benches either abstained or voted against the measures and another 7 were not present, leaving Tsipras short of the 151 seats needed for a majority of his own. Following the vote in parliament, where many leftists in his own party were stunned by his acceptance of previously spurned austerity measures, Tsipras said he would now focus on securing a deal. "The parliament today gave the government a strong mandate to complete the negotiations and reach an economically viable and socially fair agreement with its partners," Tsipras said.