A 25-year-old biker was killed and the person riding pillion severely injured in a hit-and-run - the second in seven days - at a crossing with blinking amber lights early on Saturday.

A Honda City was headed south on Deshapran Sashmal Road around 2.30am when the biker from the opposite direction turned right and came in front of the car near Rabindra Sarobar Metro, police said.

The car rammed into the bike and moved a couple of metres before coming to a stop after the air bags got deployed.

Sajal Kairi and Biswanath Ghosh, 32, were taken to MR Bangur Hospital and then shifted to Calcutta National Medical College and Hospital. Kairi died of injuries a few hours later.

Ghosh is now in AMRI Dhakuria with brain haemorrhage and multiple fractures.

The police identified the driver of the Honda City as Yash Chowdhury, 27, of Salt Lake when he gave himself up almost eight hours after the accident at Charu Market police station and was arrested.

Chowdhury, booked for causing death by negligence, was granted bail later in the day.

If proved guilty, he can be jailed for a maximum period of two years.

Last Sunday, a scooterist was killed after being hit by a Merecedes Benz on Hazra Road. Two others with him were injured. The police had said none of them was wearing a helmet at the time of the accident.

Varun Maheswari, 25, who was driving the Merc went missing for two days before being arrested and booked for culpable homicide not amounting to murder. The charge carries a maximum punishment of 10 years in jail.

His lawyers have claimed the scooterist was at fault.

Initial investigations suggest the biker was at fault in Saturday's accident, the police said. "In the Hazra Road accident, the case was initially registered under Section 304A (causing death due to negligence) of the IPC. It was later amended to section 304 (culpable homicide not amounting to murder) based on emerging evidence," an officer of the traffic department at Lalbazar said. "In this case, till now it looks like the motorcyclist was at fault. So, we have started a case under section 304A. The charge can be amended if something new emerges."

Kairi, a resident of Behala's Roy Bahadur Road, is survived by his wife and child.

Ghosh, originally from Raidighi, lives at a rented flat in Bansdroni with his wife and two kids.

His condition is said to be critical.

The traffic department's fatal squad has taken over the investigations into the hit-and-run.

Yash Chowdhury manages his family business. The Honda City is registered in his father's name.

Unsafe roads

A 44-year-old man from Karnataka was severely injured after being hit by a heavy goods vehicle near Tagore Park on the Bypass.

Rakesh Singh was taken to Ruby General Hospital. He was staying in a hotel off the Bypass, the police said.

The goods vehicle has been seized and the driver arrested.