White House calls for U.N. probe of alleged Syria gas attack

WASHINGTON |(Reuters) - The White House expressed alarm on Wednesday about reports of a massive deadly chemical weapons attack by Syrian government forces and called urgently for a United Nations investigation into the incident.

Syria's opposition accused President Bashar al-Assad's loyalists of gassing many hundreds of people - as many as 1,300 according to on report - in what would, if confirmed, be the world's worst chemical weapons attack in decades.