McCarran Airport officials say an Allegiant Airlines flight headed to Fresno, California returned back to Las Vegas due to technical issues. 

The Boeing 757 aircraft departed at 4:05 p.m. and returned back to McCarran at 4:20 p.m. after several witness reports of an engine catching fire. Clark County firefighters determined and found no signs of engines catching fire. 
There are no reports of injuries or amount of passengers on board.