A plane from Houston to Baltimore has landed with as many as 12 unconscious passengers: Plane Lands Apparently With Unconscious Passengers.

LINTHICUM, Md. — A plane landed at Baltimore-Washington International Airport late Thursday night apparently with several people unconscious.

A Southwest Airlines flight from Houston that was supposed to dock at BWI’s Gate C11 is reported to have as many as 12 people onboard who were not conscious when the plane landed, WBAL-TV 11 News reporter John Sherman reported. It is unclear as to why the people were possibly unconscious.

But airline officials told 11 News that one person was passed out on the plane and others may have been sick. Airline officials believe the illness may be food-related.

Fire-rescue crews from Baltimore and Anne Arundel counties responded to the airport, where as many as 20 ambulances were observed, Sherman reported.

As many as four Anne Arundel County medic units and at least one Baltimore County medic unit remain on standby status, but officials from both county departments said they did not transport anyone to hospitals.