G20 leaders remain divided over the Syrian conflict as
they enter the final day of their Russian summit.
Italian PM Enrico Letta said the splits were confirmed during
a working dinner in St Petersburg on Thursday.
A spokesman for the Russian presidency said a US strike on
Syria would "drive another nail into the coffin of international
law".
At the UN, the US ambassador accused Russia of holding the
Security Council hostage by blocking resolutions.
Samantha Power said the Security Council was no longer a
"viable path" for holding Syria accountable for war crimes.
The US government accuses President Bashar al-Assad's
forces of killing 1,429 people in a poison-gas attack in the
Damascus suburbs on 21 August.
The UK says scientists at the Porton Down research
laboratories have found traces of sarin gas on cloth and soil
samples.
But Mr Assad has blamed rebels for the attack. China and
Russia, which have refused to agree to a Security Council
resolution against Syria, insist any action without the UN
would be illegal.
The US and France are the only nations at the G20 summit to
commit to using force in Syria.
'Divisions confirmed'
Ms Power told a news conference in New York: "Even in the
wake of the flagrant shattering of the international norm
against chemical weapons use, Russia continues to hold the
council hostage and shirk its international responsibilities.
"What we have learned, what the Syrian people have learned,
is that the Security Council the world needs to deal with this
crisis is not the Security Council we have."
US President Barack Obama is thought to be trying at the G20
summit to build an international coalition to back strikes
against military targets in Syria.
But differences of opinion became obvious when world
leaders - including Mr Obama and Russian President Vladimir
Putin - discussed Syria over dinner on Thursday evening.
The Italian prime minister said in a tweet that "the G20 has
just now finished the dinner session, at which the divisions
about Syria were confirmed".
President Putin's press spokesman, Dmitry Peskov, said after
the dinner that the G20 was split down the middle, with some
countries seeking hasty action and others wanting the US to
go through the UN Security Council.
British sources say the leaders of France, Turkey, Canada and
the UK gave strong backing to President Obama's call for
military action. The UK Chancellor of the Exchequer George
Osborne said the Turks put a "very strong argument about
how the world must respond to the use of chemical weapons".
But correspondents in St Petersburg say opponents of US
military intervention appear to far outnumber supporters
within the G20.
And the BBC's Bridget Kendall says the views of the G20
leaders on any US action could be the least of Mr Obama's
worries, as his real difficulties might lie back in the US.
President Obama was nearly an hour late for Thursday's G20
dinner. His aides said he had been trying to find time during
the summit to call US members of Congress, who are due to
vote next week on whether to back Mr Obama's call for a
military strike.
President Obama also cancelled a trip to California on
Monday in order to lobby Congress, as a poll commissioned
by the BBC and ABC News suggested more than one-third of
Congress members were undecided whether or not to back
military action.
A majority of those who had made a decision said they would
vote against the president.
Syria's parliamentary speaker has written to the speaker of the
House of Representatives urging members not to rush into an
"irresponsible, reckless action".
Meanwhile, former Soviet leader Mikhail Gorbachev told the
BBC that Mr Obama and Mr Putin should meet in order to
find a solution to the Syrian conflict.
"They must strike up a conversation that will lead to the
improvement of relations and stop the things which are
happening now," he said.
The Assad regime has been accused of using chemical
weapons against Syrian civilians on several occasions during
the 30-month conflict.
Some 100,000 people have died in the conflict, and more than
two million Syrians are classified as refugees, according to the
UNl

This is an issue for the world powers.Aurevoire!