The plane took off from Sweden on Saturday morning. Halfway through the flight, the captain announced that a passenger had seen a mouse and that they needed to turn around.
The plane is now reported to be back at Arlanda.
Passenger Christopher Magnani was on his way to Malaga to watch a training match with AIK, as were several others on board.
The entire plane was filled with AIK fans, and there was another small rodent on board at the time, he tells Aftonbladet.
What do you think?