09/16/2014 10:14 EDT | Updated 06/16/2017 00:52 EDT

Swiss club to investigate reports its fans urinated in a rival goalkeeper's water bottle

MURI, Switzerland - A lower-league Swiss football club says it will investigate reports that some of its fans urinated in a water bottle that a rival goalkeeper then drank from.

Reto Felder, a goalkeeper who plays for Muri in the Swiss fourth division, says in the Blick daily newspaper he first thought his drink was warmed by the sun. He called the prank "crude and disgraceful."

Fans in the crowd of about 500 reportedly persuaded a ball boy to pass them the bottle.

Muri lost at Baden 3-2 on Saturday.

Baden president Thomi Braem, who promised to investigate, says fans "should realize they have again done great damage (to the club)."

Muri coach Beat Hubeli says the incident was "the lowest of the low."