Patna, Jan 18 (IANS) A case was lodged on Monday against a legislator belonging to Bihar's ruling party JD-U for allegedly misbehaving with a couple in a running train, a railway police official said here.

Inderpal Singh Bedi and his wife complained in their FIR, registered at Patna railway station, that JD-U legislator Sarfaraj Alam, his bodyguard and another aide misbehaved with them aboard the Delhi-Guwahati Rajdhani Express, the official said.

Alam and his two men allegedly passed vulgar comments about Bedi and his wife who boarded the train at Delhi, he said.

The MLA has denied the charge.

Patna rail superintendent of police P N Mishra said that investigation had begun into the case and the police would take action against the legislator if the charges were found to be true.

Alam is JD-U legislator from Jokihat assembly constituency in Araria district of Bihar. He is the son of controversial former union minister Mohammad Taslimuddin.