A subway train collision occurred in New York City, causing a derailment and minor injuries to more than 20 people. The incident happened when a 1 train carrying passengers collided with an out-of-service Metropolitan Transportation Authority train. The collision resulted in major service disruptions across Manhattan during rush hour. The cause of the collision is under investigation, with authorities looking into potential human error. Efforts are underway to clear the tracks and resume service as soon as possible.