EAST VILLAGE — Northbound 4, 5 and 6 trains were delayed Tuesday afternoon after an unauthorized person was reported on the tracks of the Astor Place train station, according to the MTA.

A person was seen on the northbound 6 train tracks around 1:35 p.m., according to the MTA and FDNY.

@dub_savvy There is a customer injury at Astor Pl. n/b 6 trains are express. — NYCT Subway (@NYCTSubway) September 20, 2016

When investigators arrived, the person could not be found, fire officials said.

As of 2:14 p.m., some northbound 4 trains were terminating at Atlantic Avenue-Barclays Center, while 5 trains were running on the 2 line between Nevins Street and 149th Street-Grand Concourse, according to the MTA's website.

There was no 6 train service between Grand Central-42nd Street and Brooklyn Bridge-City Hall in both directions, while some southbound 6 trains were terminating at 86th Street or Grand Central, the MTA's site said.

Customers could expect delays on the 2, 3, 4, 5 and 6 lines, according to the agency.

More information on service changes can be viewed on mta.info.