U.S. Secretary of State Hillary Clinton has accused Iran of backing Syria's "vicious assaults" against pro-democracy protesters.
In a statement, Clinton highlighted that Iran's alleged complicity in abuses coincides with the two-year anniversary of Iran's crackdown on protests after the contested election that gave another term to President Mahmud Ahmadinejad.
The statement gave no details on the type of assistance Iran was said to be providing Syrian authorities.
Syrian rights activists say more than 1,400 people have been killed in Syria since a popular uprising began in mid-March.
compiled from agency reports