Patna, Jan. 20 -- Bihar DGP S.K. Singhal said on Tuesday that contract for airport parking lot could be the reason behind the murder of IndiGo state head Rupesh Kumar Singh, who was allegedly shot dead by criminals near the Shastri Nagar police station area in Patna on Januray 12.

"We are investigating the case from all possible angles. Prima facie, it appears that contract for airport parking lot could be the reason behind the killing. Whoever was behind the conspiracy had hired contract killers from outside the state," Singhal said.

Earlier, Singhal briefed about the investigation to Chief Minister Nitish Kumar, who is closely monitoring this case.

Singhal pointed out that there was a dispute over the airport parking lot and the dece...