A court on Monday held four men guilty in the 1975 murder of then railway minister Lalit Narayan Mishra.
District Judge Vinod Goel held four followers of Hindu sect Anand Marg guilty of killing Mishra 39 years back.
Gopal ji, Ranjan Dwivedi, Santoshanand Avadhuta and Sudevananda Avadhuta were facing trial.
Mishra had gone to Samastipur Jan 2, 1975, to declare open the Samastipur-Muzaffarpur broad-gauge railway line.
A bomb explosion on the dais seriously injured him.
He was rushed to the railway hospital at Danapur where he died the following day.