Mouse found on San Francisco-bound flight causes 4-hour delay

SAN FRANCISCO -- A San Francisco-bound flight was delayed four hours Wednesday because a mouse was spotted aboard the plane.

Passengers were buckled up and waiting to depart in London when the crew told them they couldn't take off with the mouse on board.

One passenger tweeted "Just had my flight to SFO canceled because of a mouse on board the plane. Could it not get a Visa?"

The crew joked that the mouse couldn't enter US airspace without a passport, and told everyone they needed a whole new plane. That meant a four-hour delay.

They told KGO-TV in San Francisco after the flight arrived Wednesday that despite the delay most passengers were happy to be on a mouse-free aircraft, especially knowing they'd be eating on the flight.

British Airways apologized and said they were satisfied that only passengers with two legs were on the flight.

The flight arrived in San Francisco Wednesday evening.

The Associated Press contributed to this report.