A person trespassing in a Grand Central Station tunnel created a travel headache for rush-hour commuters Friday night — as several trains were delayed over the incident.

The intruder was found inside the Park Avenue Tunnel near 86th Street and taken into MTA police custody just after 5:40 p.m., an MTA spokesperson told The Post.

Because of the interloper, Hudson, Harlem and New Haven line trains traveling into and out of Grand Central were delayed, the MTA said in a tweet.

Service resumed after the suspect was removed from the tracks, but customers were told to expect delays of up to 45 minutes.