PHOTOS: Here's what it looked like when a subway train derailed in New York City

AP/Mary AltafferEmergency service personnel work at the scene of a subway train derailment, Tuesday, June 27, 2017, in the Harlem neighborhood of New York.A subway train in New York City derailed and crashed into a wall Tuesday morning, leaving more than 30 people with injuries and causing massive transit delays throughout the city.

The train derailed between the 135th Street and 125th Street stations in the Harlem neighborhood of Manhattan, the Metropolitan Transit Authority confirmed. According to one MTA official, the crash was caused by an abrupt triggering of the train's emergency brake, DNA Info reported. The agency is investigating why the brake was activated.

Several passengers aboard the train documented the aftermath of the accident. According to one account, firefighters and subway employees helped evacuate passengers through the window of one of the train cars.

The derailment is one of several recent incidents that have plagued the city's overburdened subway system.

Here are some photos of the incident: