TSA moves planes after reports of suspicious cargo

(CNN) -- Authorities were responding to reports of suspicious items on cargo flights that landed Friday in Newark, New Jersey, and Philadelphia, Pennsylvania.

Planes "were moved to a remote location ... out of an abundance of caution," the Transportation Security Administration said.

In Philadelphia, the fire department's hazardous material units were responding to an incident involving two aircraft -- a UPS plane and a 757 jet with no one aboard, officials said.