U.S. Secretary of State Hillary Clinton said on Thursday (January 31), indication Iran is additional manpower and more sophisticated arms to support Syrian President Bashar al-Assad.

"They (Iran) seems to increase this involvement, which is we are very worried about the problem," Clinton told reporters. Hillary Clinton on Friday departure.

"I think (Iran sent human) has increased ... people very worried that they are improving weapons quality, because Assad is about to run out of his arms."