The UN Security Council's committee on Libyan sanctions says caches of weapons and ammunition left over in the African country after the collapse of slain dictator, Muammar Gaddafi, are being smuggled into Syria.

The committee reported to the Council on Monday of "an increasing number of reported cases of trafficking of arms and ammunition from Libya to the Syrian Arab Republic by sea and air."

The committee report also revealed further details of the efforts made by Gaddafi’s younger son, Saadi Gaddafi, "and his associates to hide, move and use assets that should have been frozen."

Saadi escaped to Niger in August 2011, as the Libyan revolution gained momentum. He is still under a UN travel ban.

On June 21, a report by The New York Times said evidence collected in Syria together with flight control data and interviews with militia members, smugglers, militants, analysts and officials in several countries attest to the fact that a great deal of effort, spearheaded and financed by Qatar, is underway to transport arms from Libya to foreign-backed militants in Syria.

The report further noted that Qatari C-17 cargo planes have landed at least three times in Libya this year, including flights from Mitiga International Airport in Tripoli on January 15 and February 1, and another that departed Benghazi on April 16.

Syria has been gripped by deadly unrest since 2011. According to reports, the Western powers and their regional allies -- especially Qatar, Saudi Arabia, and Turkey -- are supporting militants operating inside Syria to overthrow the government of President Bashar al-Assad.