Lifeguards told young girls molested by a gang of migrants at a waterpark to get back into the water as they had not seen what had happened and the girls were then molested again.

The four Syrian nationals, all members of the same family, had been lurking near the pool's waterslide where they surrounded the innocent youngsters, according to local media.

Five terrified victims at the pool in Gelnhausen in the state of Hesse, on 22nd June, reported the men to lifeguards who astonishingly ignored them and told them to get back in the pool.

Pool manager Nils Tischer said: "Since we couldn't see exactly what had happened, we sent the girls back into the water with the instruction that they should please let us know if anything happened."

He admitted that it was only when the lifeguards witnessed a further incident that they gave the men a warning, yet, incredibly, allowed them to carry on swimming in the pool.

Initially, just five schoolgirls came forward and reported assaults at the outdoor pool, and it was only after the warning that the four continued assaulting young girls that the police were called.

The police are investigating the four migrants aged 18 to 28, all from one family, who allegedly sexually assaulted a total of nine schoolgirls, according to German media.

The police said the final total of victims involved nine young girls aged 11 to 17.

The alleged victims reported being touched all over their bodies by the group of Syrian men in the whirlpool area.

Christian Litzinger, mayor of Gelnhausen, told German media: "All four men come from a family in the Main-Kinzig district."

The incident was reportedly the first of its kind in Barbarossabad.

Litzinger said: "Before that, it was limited to minor thefts or insults. So we never expected something like this here."

The town has banned the four men from the swimming pool. The police investigation into the allegations of sexual assault is ongoing.

(Joseph Golder / newsX)