A Japanese man in his 60s who recently arrived in Tokyo from Liberia will be tested for Ebola after he developed a fever and reported to a medical institution in the capital on Friday, a government official said.

The man was taken to a designated holding center for suspected Ebola cases, the official said. The tests will be conducted at the National Institute of Infectious Diseases.

There is no confirmation that the man came into contact with Ebola sufferers in Liberia, the official added.

Later Friday, Chief Cabinet Secretary Yoshihide Suga told a press conference it is unlikely the man is carrying Ebola, given that he cleared quarantine checks upon arrival on Tuesday. The man departed Liberia on Oct. 26.

Earlier, a Canadian man in his 40s reported ill health after arriving at Tokyo’s Haneda airport from Liberia via London on Oct. 27. But he tested negative twice and was released from hospital a few days later.

On Friday the Japanese government said it will provide up to $100 million in additional humanitarian assistance to Ebola-hit West Africa.

The promised aid is in addition to the $40 million that Prime Minister Shinzo Abe pledged at the U.N. General Assembly in September.

Abe will talk about Japan’s efforts against the deadly virus during a series of upcoming international conferences, Suga said.

Abe is scheduled to attend meetings of the Asia-Pacific Economic Cooperation forum, the Association of Southeast Asian Nations and the Group of 20 this month.

“The spread of Ebola has been a threat to international peace and security,” Suga said. “The situation remains severe, so we have made the decision to accelerate assistance.”