NEWARK, N.J. (AP) — Police are questioning how a strange object got on a Delta Airlines flight that arrived at Newark Liberty International Airport from Minnesota.

Delta Flight 1972 had landed around 11 p.m. Monday and a cleaning crew reported the incident as the plane sat at Terminal B’s Gate 53 early Tuesday.

Authorities told The Star-Ledger of Newark the object was wedged between seats 21B and 21C. No one had been assigned the seats.

The object had the body of a clear pen, with an electrical button trigger and a nail and alligator clip protruding from it. A battery was held by electrical tape, and next to it was a flashlight top.

FBI Special Agent Bryan Tavers told the newspaper there was no imminent threat at the time the object was discovered.

(© Copyright 2011 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.)