Method behind subway car brick wall prank revealed by viral video

HAMBURG, Germany, July 14 (UPI) -- The creators of a brick wall in the doorway of a German subway train have been identified as an art group by a video posted by a British fashion label.

The video, posted to YouTube Monday by British fashion label Nofugazi, features graffiti artists known as Taps & Moses building a brick wall in the doorway to a subway car in Hamburg, Germany, in April.

The video shows masked men carrying their materials onto the train, blacking out the door windows with spray paint, and building a brick wall in the doorway.

The video then shows the surprised reactions of commuters when the doors open to reveal the wall.

Nofugazi said it was not involved in the stunt and the video was sent in anonymously.

Police were baffled by the stunt in April, saying the perpetrators could face jail time for causing thousands of dollars in damage to the train car. Investigators said in April they had not identified the perpetrators of the stunt.