UNITED NATIONS, Sept 20 (Reuters) - French President Francois Hollande blamed the Syrian government on Tuesday for the collapse of a U.S.-Russia-backed ceasefire and urged foreign supporters of President Bashar al-Assad to help enforce peace or risk the country fragmenting.

NEW YORK (Reuters) - The maker of Skittles candies on Tuesday objected to a social media post by Donald Trump Jr. in which the Republican presidential hopeful's son compared admitting Syrian refugees to the United States to eating poisoned pieces of the brightly colored, fruit-flavored treats.

UNITED NATIONS, Sept 20 (Reuters) - Qatar's emir criticized U.S. President Barack Obama's policy on Syria on Tuesday, highlighting the growing frustration among U.S. allies at what they perceive to be Washington's lackluster action towards the protracted civil war.

WASHINGTON, Sept 20 (Reuters) - Two Russian Sukhoi SU-24 warplanes were in the skies above an aid convoy in Syria at the precise time it was struck on Monday, two U.S. officials told Reuters on Tuesday, citing U.S. intelligence that has led them to conclude Russia was to blame.

NEW YORK, Sept 20 (Reuters) - Syria's chief opposition coordinator Riad Hijab said on Tuesday that international efforts to achieve a ceasefire in Syria's civil war were doomed without any credible mechanism to designate blame or attribute consequences.

UNITED NATIONS, Sept 20 (Reuters) - U.S. President Barack Obama said on Tuesday that the situation in Syria is unacceptable and the world is not as unified as it should be to try to stop the more than five-year-old conflict.

PARIS (Reuters) - France warned on Monday that an offensive by forces loyal to eastern Libyan commander Khalifa Haftar on oil sites risked sending the country backwards and urged the national unity government to be more inclusive to break a political deadlock.

WASHINGTON, Sept 20 (Reuters) - An attack on a convoy carrying humanitarian supplies in the Aleppo area of Syria appeared to be an air strike but it was not carried out by coalition jets, U.S. Central Command spokesman Colonel John Thomas said on Tuesday.