UNITED NATIONS (Reuters) - Syria has agreed to allow U.N. investigators to visit three sites to investigate accusations of chemical weapons use during the country's two year civil war, the United Nations said on Wednesday.

"The Mission will travel to Syria as soon as possible to contemporaneously investigate three of the reported incidents, including Khan al-Asal," U.N. Secretary-General Ban Ki-moon's press office said in a statement.

(Reporting by Michelle Nichols; Editing by Vicki Allen)