Three women and four minors have been killed in a road accident in West Bengal's Nadia district, police said on Saturday.The incident took place around 8 p.m. in Chapra on Friday when a battery-operated rickshaw (Toto) was hit by a speeding truck coming from the opposite direction."Seven people in a Toto were killed in the head-on collision with the speeding truck," a police officer said."Three more persons with injuries were admitted in hospital," he added.One person has been detained.