The US-led coalition has carried out an air strike to block Islamic State group fighters evacuated from Lebanon from reaching eastern Syria, its spokesman told AFP on Wednesday.

"To prevent the convoy from moving further east, we cratered the road and destroyed a small bridge," Colonel Ryan Dillon said, adding that the coalition had conducted an air strike. 

Hundreds of IS fighters were evacuated Monday from the border region between Lebanon and Syria under a ceasefire deal and were headed to an IS-held town Syria's eastern frontier with Iraq.