An Olympic woman marathon runner from India has alleged she was not provided water and energy drinks by Indian officials at designated stations.

OP Jaisha said she "could have died" after the women's marathon event in Rio.

Jaisha, 33, was placed 89 and collapsed after finishing the 42km (26 miles) race in 2:47:19 last week.

Indian officials denied the allegation and said Jaisha and her coach had refused refreshments.

The Athletics Federation of India (AFI) said officials in Rio were not told by the athletes or their coaches about any specific requirement for any drinks.

"It is the responsibility of the organisers to provide water and energy drinks. For that there are water and energy stations throughout the course," senior AFI official CK Valson told the Press Trust of India (PTI) news agency.

'Scorching heat'

"We could have provided water and energy drinks to our athletes but neither they nor their coaches informed us that they would need water and energy drinks separately."

Jaisha said she ran "in scorching heat" and there was no water available during the race.

"Only once in 8km did we get water [from the Rio organisers] which did not help at all. All the countries had their stalls at every 2km but our country's stall was empty," she was quoted as saying by PTI.

Jaisha collapsed at the finish line after completing the marathon and had to be taken to hospital.

"We are supposed to be given drinks by our technical officials, it's the rule. We cannot take water from any other team. I saw the Indian board there but there was nothing," she said.

"I had a lot of problem, I fainted after the race. I was administered glucose, I thought I would die."

Jaisha said she got no response from officials when she asked why water was not provided to her at the stalls.

"I don't know who to blame for this. May be nobody realises the seriousness of a marathon, the fact that we have to run 42km," she said.

India's Sports Minister Vijay Goel has said he will investigate the allegation.

"I'll look into this and if there was negligence of any sort, action will be taken," he told NDTV.

India finished with just two medals at the Rio Games, fewer than the six medals it won during their best-ever performance in London four years ago.

• Indian boxers were threatened with disqualification after they turned up in shirts which didn't have India's logo - a key requirement at the Games.
• Sports Minister Vijay Goel was reportedly warned after some of his staff behaved rudely and tried to enter the venues without proper accreditation.
• The minister received further criticism when he wished luck to Indian sprinter Srabani Nanda, but ended up posting the picture of another athlete, Dutee Chand, with his tweet.
• The appointment of a radiologist as the chief medical officer of the Indian team in Rio also received criticism. Authorities, however, said that the radiologist, the son of a senior sports official, "knew sports medicine well".
• Some hockey players complained that they were invited to an official function to celebrate India's Independence Day, but "were only given peanuts to eat instead of proper dinner".