Mar 30, 1:32 PM (ET)
DETROIT (Reuters) - Security officials aided by sniffer dogs swept through three U.S. passenger jets on Tuesday after they were targeted by bomb threats, authorities said.
The aircraft, all operated by Northwest Airlines, included one that arrived at Detroit's Metropolitan Airport on Tuesday morning on a flight from Miami, spokesmen for Northwest and the Transportation Security Administration, told Reuters.
The plane in Detroit was still being searched about two hours after it landed, according to TSA spokeswoman Yolanda Clark, who added that no explosive device had been found aboard the aircraft.
"So far these threats have not turned out to be credible," Clark told Reuters. She said she was unaware of the source of the bomb threats but added that authorities were "taking every precaution available."
The second and third flights, from Memphis to Miami and Los Angeles to Detroit, were stopped before takeoff and were being searched by Northwest and federal officials, Northwest said in a statement.
updated: 3 Amtrak trains around Miami were also included in the threat
[Edited 2004-03-31 00:03:44]