Subway commutes disrupted by someone activating emergency brakes, officials say

The Metropolitan Transportation Authority said the disruptions mainly affected the 2 and the 3 lines.

“If you see any suspicious behavior, please @ or DM us details ASAP, including car #, so we can get trains back on schedule,” the MTA said in a tweet.

By 9 p.m. Tuesday, the trains were no longer delayed because of the emergency stops, the MTA said.

The MTA did not immediately say how many trains were affected or for how long commutes had been delayed. The transit agency also did not say what it believed the individual’s motive was in activating the brakes.

Riders can activate the emergency brakes from subway cars by pulling a cord. When that happens, the conductor of the train has to get out and investigate the source of the disruption, including checking whether there is an obstacle on the tracks, according to the MTA.

This article originally appeared in The New York Times.