Police launched an investigation after two dozen people suffered burns from T-shirts given to them during a stand-up paddleboarding tournament, according to police in Japan.
Police said that the incident unfolded at the tournament, which was run by Stand Up Paddle Union Japan in Chigasaki City.
A spokesperson for Stand Up Paddle Union Japan, said that they have recalled 360 T-shirts that were given away at the tournament.
At least 24 people have reported that they got burns and blisters while wearing the shirts. One participant told investigators that the shirt felt slimy when he entered the water.
When he came out of the water, his back was covered in blisters. He said that he is unable to sleep due to the pain.
Police are questioning the manufacturer who is facing a charge of negligence, as a chemical residue was found on the T-shirts.