The International Olympic Committee (IOC) has condemned the way India's top wrestlers are being treated during their ongoing protest.

It has also demanded an investigation into allegations that Indian wrestling chief Brij Bhushan Sharan Singh sexually harassed female athletes.

The wrestlers were temporarily detained by police on Sunday as they tried to march to the new parliament building.

They were demanding the resignation and arrest of the federation chief.

Mr Singh, who is also an influential MP from the governing Bharatiya Janata Party (BJP), has denied the allegations and accused the wrestlers of being "politically motivated".

On Tuesday, he told reporters that the Delhi police was investigating and that they would arrest him if they found anything against him. "Let the investigation take place, it is in the hands of Delhi police," he said.

Olympic medallists Sakshi Malik and Bajrang Punia and two-time world champion medallist Vinesh Phogat, were among those who were detained and later released by the police on Sunday. The police also filed cases including of rioting against them.

Indian wrestlers risk Olympic dream for '#MeToo' protest Indian wrestler says she told Modi about harassment

Visuals of the athletes being dragged and carried off in buses went viral, sparking criticism from top athletes and opposition politicians.

In a statement on Tuesday night, the IOC "urged the safety and wellbeing of these athletes" and called for "a speedy conclusion" of the investigation.

It said it had been in close contact with United World Wrestling (UWW) - the international organisation governing amateur wrestling - over the situation.

The UWW also issued a statement on Tuesday saying that it was following "with great concern" the wrestlers' protests "over allegations of abuse and harassment by the president of the Wrestling Federation of India (WFI)".

"It expresses its disappointment over the lack of results of the investigations so far," the statement said and added that the UWW would hold a meeting with the wrestlers to inquire about their safety and "reconfirm our support for a fair and just resolution of their concerns".

The UWW also said that it might suspend the WFI if its upcoming elections were not held on time.

The wrestlers, who have been protesting for over a month now, had first protested in January but called it off after Mr Singh was stripped of his administrative powers by the sports ministry and the government promised to investigate their complaints.

However, they restarted their protests in April, calling for his arrest.

On Tuesday, the wrestlers had threatened to throw their medals into the Ganges - India's holiest river. They said they had first considered returning their medals to the president and the prime minister but were disappointed that they had not spoken about the protests even once.

"These medals are our life and soul... We feel there's no meaning to having these medals around our necks anymore," they said in a statement.

But they were persuaded by Naresh Tikait, leader of influential farming group Bharatiya Kisan Union (BKU), to not throw their medals yet. Mr Tikait later told reporters he was giving the government five days to take action.