By Helen Collis PUBLISHED: 11:27 EST, 6 September 2013 | UPDATED: 15:02 EST, 6 September 2013 Attempting to reach an agreement on the key issue at the G20 summit - military intervention in Syria - looked futile this afternoon as leaders wrapped up with closing speeches. Russian president Vladimir Putin said strikes against Syria would be 'counter productive' and disrupt the world economy. While David Cameron warned the international community that it cannot 'contract out' its morality by allowing Russia to block intervention in crises such as that engulfing Syria. Happy families: The world's leaders pose for a 'family photo' at the G20 summit in St Petersburg where opinion remains deeply divided over intervention in Syria
@highlight
Putin says Syria military intervention would be 'counter-productive'
@highlight
Russian president says majority of G20 leaders oppose forceful action
@highlight
Cameron advocates military action; Putin reminds he's not backed by parliament
@highlight
President Barack Obama says he's not heard any other credible strategies
@highlight
Francois Hollande is US's strongest ally, met Obama on summit sidelines
@highlight
Cameron says military action should not need UNSC endorsement
@highlight
Obama would not be drawn on whether action would be taken without Congressional approval
Host: Russia's President Vladimir Putin has hinted that he would be prepared to help Syria should Obama push @placeholder military intervention
Putting up stiff resistance to @placeholder's appeals, Russia on Friday warned the United States and its allies against striking any chemical weapon storage facilities in Syria.