The number of abuse complaints made against a 28-year-old swimming teacher from Soest has risen to 24, with several cases involving children from the same family, news agency ANP reports on Tuesday.

The man was arrested in March following allegations he sexually abused several young boys in his care. The complaints now also involve girls. Most of the children are aged four to eight, ANP says.

The man was investigated after similar complaints were made about him several years ago. However, no evidence was found and the case was dropped.

The man has worked at various swimming pools around the country but the complaints centre on a pool in Spaarnwoude.