An elderly motorcyclist died after being hit by a bus on a crowded MG Road near its intersection with the Sealdah flyover on Wednesday afternoon.

Police said the motorcyclist and the pillion-rider both were wearing helmets.

“We are analysing CCTV camera footage to ascertain whose fault caused the accident,” said an officer of Muchipara police station. “There could be two possibilities — either the motorcycle tried to overtake the bus from the left and the bus hit it or the bus was being driven rashly and it hit the motorcycle from behind.”

The accident happened at 12.10pm in front of Chhabighar cinema. The victim has been identified as Mohammad Hasim Khan, 64, a resident of Colootola Lane. The pillion rider, Aga Sayed Kasim, 66, is a resident of Rabindra Sarani.

Both were taken to NRS hospital, where Khan died. Kasim has suffered critical injuries.

The bus — on route 28 — was intercepted and the driver booked for causing death due to negligence. If convicted, he can be jailed for two years.

The incident happened two days after a scooterist was hit by a car from behind and flung off the Parama flyover, suffering fatal injuries. The scooterist apparently stopped on the flyover to answer a phone call.