UN weapons experts is due on Monday to check gassed up a website, hundreds of people in the Damascus suburbs, from the West's military action to punish past 25 years the world's most serious apparent chemical weapons attack in the capital calls.
Syria on Sunday agreed to allow inspectors to visit the site. United States and its allies said the government shelling of the region in the past five days, and the Syrian offer to allow inspectors to come too late evidence has been destroyed.
Washington has faced calls for action, in Wednesday's attack, which is a year later, U.S. President Barack Obama announced the use of chemical weapons was a "red line", which will require a strong response.
Obama has been reluctant to intervene in Syria 2-1/2-year-old conflict and U.S. officials stressed that he has not yet decided how to respond. A senior Republican Senator Bob Corker said he believes Obama will ask Congress to authorize the use of force when Congress returns next month summer recess.
Secretary of State John Kerry said he had "very little doubt" The Syrian government has gassed its own citizens foreign counterparts in a circle on the phone.
U.S. State Department said Kerry stressed that in France, the UK and Canada Foreign Minister and the UN Secretary-General Ban Ki-moon and Russian Foreign Minister Sergei Lavrov calls.
Russia is a major ally of Syrian President Bashar al-Assad, suggested the rebels might be behind the chemical weapons attack, and said it would be a "tragic mistake", who is responsible to jump to conclusions.
The White House said Obama and French President Francois Hollande of the "international community" to discuss possible responses.
British Prime Minister David Cameron and German Chancellor Angela Merkel agreed, saying: "This attack requires a firm response to the international community," Cameron's office said.
Syria observers say, the government decided to allow the inspection may have tried to avoid intervention.
"My view is that the Syrian government has apparently agreed to UN inspectors raised the possibility of military action is growing," said Malcolm Chalmers of the Royal United Services Institute's research director.
"I think this is why they are doing."
In London, Foreign Secretary William Hague said the evidence of chemical attack may have been damaged areas or in the days following the strike degradation subsequent bombardment.
"We are now the reality of the UN team can achieve anything," he told reporters.
Ceasefire during inspections
UN says Damascus has agreed to a ceasefire, the UN expert on-site inspections.
Syria confirmed that it has agreed to allow inspectors access to the huge event that takes place before dawn, after a night of heavy bombardment arrived in Syria three days before the survey of smaller chemical weapons allegations.
MSF reported that at least 355 people were dead in three hospitals symptoms of poisoning. Assad's opponents have given death tolls ranging from 500 to over 1,000.
Expert's mission is to find out whether the use of chemical weapons and not to transfer blame, but they collect evidence, such as the use of missiles that can provide a strong indication of the identity of the responsible party.
If the United Nations team won independent evidence, it may be easier to build an international diplomatic intervention. Former weapons investigators say, every hour matters.
Damascus Luxury Hotels of the team has been waiting for from the site has been the world's worst chemical weapons to attack the army of Saddam Hussein gassed thousands of Kurds in Iraq in 1988, what happens a few miles.
Syrian Information Minister said that any U.S. military action would "create a fireball that will arouse the Middle East."
He said there is evidence that the use of chemical weapons Damascus overthrow Assad rebels fighting, not by his government. Western countries say they believe the rebels lack of gas weapons can save it.
Assad's closest ally Iran, Obama repeated his past rhetoric, saying that the United States should not cross the "red line" attack Syria.
Two and a half years, we have more than 10 people were killed in the war began, the United States and its allies have not taken direct action, although recently said that Assad must start power.



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