A Lithuanian athlete who is due to compete at Tokyo 2020 is suspected of having COVID-19 ©Getty Images

A Lithuanian swimmer due to compete at the delayed Olympic Games here in Tokyo has recorded two negative tests for COVID-19 after receiving a scare following an inconclusive result.

Kyodo News reported the athlete had tested negative when he arrived at Tokyo's Haneda Airport.

The Lithuanian National Olympic Committee (LTOK) said he returned an inconclusive result in a saliva antigen test at his hotel in Hiratsuka, which is hosting Lithuania's pre-Tokyo 2020 training camp.

The swimmer, believed to be in his 30s, twice tested negative at a medical facility and has returned to training, the LTOK said.

A member of the Israeli delegation for the Olympics, set to open on July 23, has tested positive and is undergoing a 14-day quarantine at a Government-designated facility, Kyodo reported.

Serbian rower Miloš Vasić tested positive upon arrival in Tokyo last week, while two cases were also discovered among a Ugandan delegation that travelled to Japan in June.

The delayed Tokyo 2020 Olympics are due to open on July 23 ©Getty Images
The delayed Tokyo 2020 Olympics are due to open on July 23 ©Getty Images

Organisers have acknowledged it is impossible to ensure there are no cases when teams arrive in Tokyo, but have stressed countermeasures are in place.

COVID-19 concerns have dominated the build-up to the Games, postponed to this year because of the virus.

A new state of emergency declared in Tokyo due to rising numbers of coronavirus cases led to the Japanese Government banning domestic fans from all events that are scheduled to take place in the capital.

Overseas spectators had already been barred, but there are set to be local spectators inside venues in Miyagi, Fukushima and Shizuoka.

Health experts have warned the Games could become a "super-spreader" event, while Shigeru Omi, the Japanese Government’s top COVID-19 advisor, has warned staging the Olympics during a pandemic is "abnormal".