At least five persons have been arrested from New Town near Kolkata in connection with the murder of gangster Chandan Mishra in a Patna hospital, police said on Saturday.

The accused were apprehended from a housing complex in the satellite township of the metropolis following raids conducted jointly by the Bihar Police and its West Bengal counterpart in the early hours of Saturday, they said.

Mishra, a resident of Buxar district of Bihar, was shot dead by gunmen inside a private hospital in Patna on Thursday morning. He was a murder convict out on parole. All the accused were hiding in a flat in the housing complex in the New Town area. Of the five, four were directly involved in the killing. Whether the fifth accused was involved in the crime or he only helped the others to hide is being probed. They fled Patna after the incident and came to Kolkata, a police officer said.