A sleepy pilot who approached the runway at the wrong angle and ignored warning signs was to blame for a passenger plane crash in southern India in May that claimed 158 lives, according to reports.

A Court of Inquiry probe concluded the Air India pilot Zlatko Glusica, from Serbia, was asleep for much of the three-hour flight and was “disorientated” when the plane started to descend, the Hindustan Times reported.

The low-cost Air India Express plane flying from Dubai to the city of Mangalore overshot the runway, plunged into a gorge and burst into flames. Eight people survived the inferno.

The official crash report, which has not been released publicly, was submitted to the civil aviation ministry. Voice recordings picked up the co-pilot saying: “We don’t have runway left,” seconds before the disaster.

Most of the dead were migrant workers returning from the Gulf where many Indians from southern states find low-paid employment as construction workers or domestic staff in cities such as Dubai.