AFP reported on Monday that UN experts are investigating missile strikes near Libya's capital, Tripoli, that were likely fired by Chinese-made drones and point to possible involvement by the United Arab Emirates in Libya.

The report said a UN panel of experts filed a report to the Security Council in which it had examined photographs of missile debris and had identified the weapon as a Blue Arrow air-to-surface missile, which has not been used in Libya before.

The attack on April 19-20 on the southern suburbs of Tripoli was carried out by forces loyal to Khalifa Haftar.

"That missile is only in use in three countries -- China, Kazakhstan and the United Arab Emirates -- and is paired with the Chinese-made Wing Loong drone." AFP explained.

It added that the UN panel is now investigating the probable use of Wing Loong UAV variants by Haftar's forces, or by a third party in support of them.

"The experts said the use of the drones was likely a recent non-compliance of the arms embargo as the weapon system reported on has not been identified in Libya before," the report sent to the UN Security Council on last Thursday says.

Khalifa Haftar's offensive on Tripoli has entered the second month without any solid achievement, that is the entry to Tripoli, which was scheduled by Haftar in the span of 48 hours.

The UNSMIL called on Sunday on all parties to commit to an extendable one-week humanitarian truce starting Ramadan 01, but Haftar issued a statement ordering his forces to continue fighting during Ramadan, saying this holy month is a month of jihad and Islamic conquests.