LOS CABOS, Mexico - US President Barack Obama will press Vladimir Putin over Russia's role in the Syrian crisis when they meet on Monday but appears to have little chance of persuading him to budge on Moscow's resistance to tougher UN action against Damascus.

After a week of Cold War-style recriminations between US and Russian diplomats, the talks at a Group of 20 summit in Mexico will test whether the two leaders can forge a working relationship and find common ground on Syria and other festering disputes.

Suspension of the UN monitoring mission in Syria over the weekend has put added pressure on Obama and Putin, meeting for the first time since the Russian president's re-election, to act decisively to keep the conflict from spiraling into civil war.

But with relations frayed and expectations low on both sides for progress on breaking the deadlock, the stage is set for an uncomfortable meeting in the Pacific resort of Los Cabos.

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