At least 20 people died and hundreds were injured in a bridge collapse in the eastern Indian city of Kolkata Thursday. Rescue workers tried to free as many as 100 people believed to be trapped under concrete and metal. Before rescue teams arrived, local residents and firefighters used their bare hands to try to rescue people trapped under the debris. Witnesses said many people and vehicles, including two buses carrying more than 100 passengers, were under the bridge when it fell. They also said construction workers had set up camps near the bridge site where they would sleep and cook. The collapsed bridge is in a busy commercial area of Kolkata. Its location has made it difficult for rescue operations. Access to the area is blocked on both sides by buildings, and the streets are blocked with heavy traffic. Reuters reports that the Chief Minister of West Bengal, Mamata Banerjee, rushed to the scene of the collapse. She said that rescuing those trapped is her “top priority.”