A Belarusian athlete who took refuge in the Polish embassy in Tokyo on Monday a day after refusing her team's orders to board a flight home from the Olympic Games has been granted a humanitarian visa by the Polish government.

Sprinter Krystsina Tsimanouskaya plans to leave for Poland in the coming days, a Polish deputy foreign minister, Marcin Przydacz, told Reuters.

She is "safe and in good condition" after walking into the embassy on Monday morning, he said.

Another deputy foreign minister, Pawel Jablonski, said: "I can confirm that we have issued a humanitarian visa. I can confirm that we will provide all necessary support in Poland if she wishes to use it."

Tsimanouskaya, 24, had been due to compete in the women's 200 metre heats on Monday but she said that on Sunday she was taken to the airport to board a Turkish Airlines flight.

She refused to board the flight, telling Reuters: "I will not return to Belarus."

The incident has put renewed attention on the political discord in Belarus, a former Soviet state that is run by President Alexander Lukashenko.

Police there have cracked down on dissent following a wave of protests triggered by an election last year which the opposition says was rigged to keep him in power.

The athlete pulled up in front of the Polish embassy in an unmarked silver van about 5pm local time (9am Irish time). She stepped out with her official team luggage, and then greeted two officials before entering the premises.

Two women, one carrying the red and white flag considered the symbol of opposition in Belarus, came to the gates to support her.

Her husband, Arseni Zhdanevich, will join her in Poland, a Warsaw-based Belarusian opposition politician said.

"Thanks to the support of the Belarusian Athletes' Solidarity Foundation, (Tsimanouskaya's) husband is in Kiev and he will join Krystsina," Pavel Latushko told Reuters.

Zhdanevich had already entered Ukraine, a Ukrainian interior ministry source said.

Tsimanouskaya told a Reuters reporter via Telegram that the Belarusian head coach had turned up at her room on Sunday at the athletes' village and told her she had to leave.

"The head coach came over to me and said there had been an order from above to remove me," she wrote in the message. "At 5 (pm) they came my room and told me to pack and they took me to the airport."

But she refused to board and sought the protection of Japanese police at the airport.

The Minister for Foreign Affairs has described the plight of Krystsina Tsimanouskaya as ''disturbing''.

Simon Coveney told RTÉ News, it is ''not what we want to see during the Olympics''.

Mr Coveney said nobody wants to see politics and sport mix and see a young athlete take refuge in another country's embassy.

''She has sought a humanitarian visa [from Poland] because she doesn't want to go home and is obviously fearful to return to Belarus,'' Mr Coveney said.

Minister Coveney said the situation says ''an awful lot about the Lukashenko regime in Belarus where their own athletes are even nervous to come home''.

'The coach added me to the relay without my knowledge'

Tsimanouskaya said she had been removed from the team as she had spoken out about what she described as the negligence of their coaches.

She had complained on Instagram that she was entered in the 4x400m relay after some members of the team were found to be ineligible to compete at the Olympics because they had not undergone a sufficient amount of doping tests.

"And the coach added me to the relay without my knowledge," Tsimanouskaya said.

The Belarusian Olympic Committee said in a statement coaches had decided to withdraw Tsimanouskaya from the Games on doctors' advice about her "emotional, psychological state".

Belarus athletics head coach Yuri Moisevich told state television he "could see there was something wrong with her... She either secluded herself or didn't want to talk."

Earlier on Monday, International Olympic Committee spokesperson Mark Adams said officials would continue conversations with Tsimanouskaya and had asked for a full report from Belarus' Olympic committee.

The Japanese government said the athlete had been kept safe while Tokyo 2020 organisers and the IOC checked her intentions.

"Japan is coordinating with relevant parties and continues to take appropriate action," said chief cabinet secretary Katsunobu Kato said.

The United States ambassador to Belarus, Julie Fisher, said Lushenko's government had tried to discredit and humiliate Tsimanouskaya for expressing her views, and she praised the Japanese and Polish authorities for their quick action.

The IOC spokesperson also said it had taken a number of actions against Belarus' Olympic Committee in the run up to the Games following nationwide protests in the country.

In March, the IOC refused to recognise the election of Lukashenko's son Viktor as head of the country's Olympic Committee. Both father and son were banned from attending the Games in December.

Tsimanouskaya 'quite right to be concerned'

The Executive Director of Amnesty International Ireland has said Tsimanouskaya is "quite right to be concerned" about what may happen to her if she returns home.

Speaking on RTÉ's News at One, Colm O'Gorman said said the actions of the Belarusian government is "extraordinarily concerning".

"We know that between May and October of last year alone, local monitors documented 400 instances of attacks on media workers and journalists, other arrests, torture, and other ill treatments in those months alone."

"It is an extremely autocratic regime that abuses the rights of its people with absolute dogged determination.

"It suppresses any dissent, and we have seen in the last year or two, for instance, students, academics, religious and cultural figures and indeed athletes being directly targeted and subjected to even criminal sanctions for speaking out in any way against the authorities, even if all they did was listen to support, and peaceful protest. So she is quite right to be concerned."

Mr O'Gorman said it is "critically important" that the International Olympic Committee "step up".