Kolkata: Three persons were killed and one injured in two separate road accidents in the city on late Tuesday night.Two youth were killed while another sustained critical injuries when the scooter they were riding skidded near Park Clinic nursing home on AJC Bose on late Tuesday night.The deceased have been identified as Ubed Hasan and Afroz Khan. According to police, Hasan was riding the scooter with Khan as pillion. They scooter was at a top speed when Hasan lost control over the scooter near Park Clinic nursing home. According to the preliminary investigation, police said the accident happened when the scooter skidded. The victims, who were not wearing helmets, fell from the scooter and hit the divider. Police suspect that there was accumulated water which might have led to the accident. The biker could not control the scooter as it was at a high speed. Also Read – Heavy rain hits traffic, flightsLocals rushed the victims to a nearby hospital where the duo was declared brought dead. They had critical injuries in their head. While another youth, whose identity is yet to be confirmed by the police, has been undergoing treatment in a hospital with serious injuries. Police said the victims were going to Camac Street area from Narkeldanga on late Tuesday night when the incident occurred.Another incident took place near Muchibazar area of Ultadanag when a youth was knocked down by a speeding vehicle. The victim was trying to cross the road at around 12 am on Tuesday night. The driver of the vehicle fled the spot along with the vehicle after the accident. Police are trying to ascertain the identity of the victim. The incident triggered tension in the area with locals staging a demonstration at the site of the accident.Locals alleged that the victim was lying on the road for quite sometime before he was taken to the hospital by the police. The youth aged between 30-35 was declared brought dead after being taken to a hospital. The incident caused traffic jam in the area for a few minutes. The situation was later brought under control by the senior police officers. Police are yet to identify the vehicle and examining the CCTV footages.