Major questions are being raised after a plane suspected of carrying terrorists and explosives was mistakenly allowed to go to the gate instead of being sent to an isolated impound area last week.

Two packed planes were isolated on the tarmac at John F. Kennedy Airport last Monday after authorities got calls claiming there were bombs on the planes and terrorists in the wheel wells.

However, there apparently was a huge mix up during the incident.

Sources told CBS 2 the wrong plane was sent to the impound area and the plane that received the threat was allowed to taxi right up to the gate.

The threat turned out to be a hoax, but Strang said if it had been a real terror situation, it could have wrecked havoc in the secure zone at JFK and possibly other airports all over the world.

Sources told CBS 2 that the threat from an unidentified caller named two planes — an American Airlines flight from from San Francisco and a Finnair flight from Chicago. But there was also a Finnair flight from Helsinki landing at the same time.

The Helsinki flight was mistakenly put in quarantine, sources said, and the Chicago Finnair flight was allowed to go to the gate. Officials dodged a bullet because the call was a hoax, CBS 2′s Kramer reported.

The Port Authority Inspector General is investigating the incident to see who made the mistake and misdirected the plane.

The report is expected by the end of the week.

(Source: WCBSTV)