It was claimed that Colombian male Ultimate players sexually assaulted one or more female Ultimate players in March 2016.

The anonymous complaints were submitted following posts on social media, and were received in May this year.

Julie Gabriel and John Liljelund, who are independent sport professionals, concluded they could not commit to a full investigation because there were no police reports or medical reports regarding the alleged assault and that the National Federation did not carry out its own investigation - despite the incident seemingly being only among Colombian nationals.

The fact that the complaints were anonymous also factored into the decision.

In a statement regarding the allegations the WFDF said: "This conclusion does not mean that the Integrity Officers dismiss the complaints as not having substance, but rather that the circumstances regarding the complaints would make it nearly impossible to conduct a reasonable investigation, as outlined in the safe sport policy.

"If new allegations were to arise, a more complete investigation would be commenced that might also take into account these earlier complaints."

The WFDF has continued to encourage athletes who believe they are victims of abuse, discrimination, assault, or harassment to seek help immediately by filing a police or medical report and informing their national association.

"WFDF takes all allegations of abuse, discrimination, assault, or harassment very seriously," the WFDF said in a statement.

"These issues are addressed under WFDF’s safe sport policy and its conduct policy."