The chemical attack that  claimed a reported 335 lives in Syria will now be under investigation by the UN. Syria agreed Sunday that the United Nations can inspect the site of where the weapon attack occurred on Monday.

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Over the past few days foreign powers have been discussing the attack in Syria to determine not only the root of the cause but how it affects foreign relations. The attack in a Damascus suburb is confirmed as the worst chemical weapons attack in 25 years.

The United Nations said Damascus agreed to a ceasefire while the U.N. experts inspect the site on Monday with Syria's approval. Although, Reuters is reporting that a U.S. official said the offer to investigate the sight had come to late to be credible. The U.S. is still deciding on how to respond to the attack but have little doubt the attack was government planned.

According to Reuters the U.S. official said Sunday:

"Based on the reported number of victims, reported symptoms of those who were killed or injured, witness accounts and other facts gathered by open sources, the U.S. intelligence community, and international partners, there is very little doubt at this point that a chemical weapon was used by the Syrian regime against civilians in this incident," the U.S. official said.

"At this juncture, any belated decision by the regime to grant access to the U.N. team would be considered too late to be credible, including because the evidence available has been significantly corrupted as a result of the regime's persistent shelling and other intentional actions over the last five days."

Although the various scenes of the attack may be difficult for investigators to comb through the world is waiting to see how the U.S. will respond. President Obama has declared that use of chemical weapons would create a "red line" with serious consequences but has yet to announce the U.S.'s position. Reports from Huffington Post state that Syrian rebels are smuggling evidence to the UN for their investigation.

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