NEW DELHI — Rescuers waded through piles of debris and wreckage to pull out bodies and free people after two passenger trains derailed Friday night in India, killing more than 230 people and leaving hundreds of others trapped inside more than a dozen mangled rail cars, in one of the country’s deadliest train crashes in decades. The accident, which happened about 220 kilometers (137 miles) southwest of Kolkata, led to a chaotic scene as rescuers climbed atop the wrecked trains to break open doors and windows using cutting torches to free survivors. About 900 people were injured in the accident in Balasore district in the eastern state of Odisha, said P.K.