But Carwyn Jones, Labour's First Minister of Wales, backed the action, as long as it was part of a wider plan to bring peace to the region.
"Further UK military intervention in Syria's appalling multi-sided war risks escalating an already devastating conflict", Corbyn said, adding that "ministers should take their proposals, such as they are, to parliament".
"Britain should be playing a leadership role to bring about a ceasefire in the conflict, not taking instructions from Washington and putting British military personnel in harm's way".
"Theresa May should have sought parliamentary approval, not trailed after". "But the USA administration is giving alarmingly contradictory signals", he said.
Russian President Vladimir Putin issued a statement Saturday denouncing the United States-led military attack in Syria calling it "an aggression against a sovereign state which is at the forefront of the fight against terrorism", and echoing Corbyn's concerns that the multi-national strikes were not sanctioned by the U.N. Security Council and thus were "in violation of the U.N. Charter and principles of global law".
She has said she will make a statement to the House of Commons on Monday.
"Air strikes by USA and United Kingdom forces have not resolved the situation in Syria in the past and I am not persuaded they will do so now", the Scottish First Minister said. "The UK prime minister is accountable to Parliament, not to the whims of a USA president".
"This action risks not just further escalating the civil war in Syria but also a risky escalation of worldwide tensions".
Downing Street said there had been ministerial agreement that such actions should not go "unchallenged".
Mr Corbyn added there was only a legal basis for action if there was a direct threat to the United Kingdom and instead claimed the Government should be urging Russian Federation and the U.S. to agree to an independent UN-led investigation into the attack of the Damascus suburb of Douma on April 7, which killed up to 75 people, including children.
May said chemical weapons had "all too often" been used in recent times.
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