DETROIT, MICHIGAN — U.S. Customs and Border Protection diverted Air France Flight 378 from Detroit Metropolitan Wayne County Airport to Montreal on Wednesday after denying entry to a passenger who had traveled from the Democratic Republic of the Congo. The flight, which had departed from Paris, landed in Montreal shortly after 5 p.m. ET, according to flight tracker data.

"CBP took decisive action and prohibited the flight carrying that traveler from landing at Detroit Metropolitan Wayne County Airport, and instead, diverted to Montreal, Canada." a U.S. Customs and Border Protection spokesperson said. "Due to entry restrictions put in place to reduce the risk of the Ebola virus, the passenger should not have boarded the plane."

The flight was operating in conjunction with Delta Airlines during the change in arrival location. An Air France spokesperson said the aircraft was diverted at the request of U.S. authorities after the passenger from the Democratic Republic of the Congo was denied entry into the United States.

"There was no medical emergency on board." the Air France spokesperson said. "Like all airlines, Air France is required to comply with the entry requirements of the countries it serves."

According to a Centers for Disease Control and Prevention announcement, the U.S. will restrict entry for people without U.S. passports who were in the Democratic Republic of the Congo, South Sudan or Uganda in the last three weeks. The restriction is in effect for 30 days.

A notice submitted to the Federal Register announced new arrival restrictions by U.S. Customs and Border Protection and the Department of Homeland Security. The restrictions direct all flights to the U.S. carrying passengers who have traveled to the Democratic Republic of the Congo, Uganda or South Sudan in the previous 21 days to land at Washington-Dulles International Airport in Virginia, where the U.S. government is focusing public health resources. The arrival restrictions begin Thursday and apply to any person who departed from, or was present within, those countries within 21 days of entry or attempted entry into the U.S.

The outbreak is driven by the Bundibugyo strain of the virus, according to a World Health Organization statement, which said a vaccine for that strain is most likely months away from human trials, with no guarantee it would work. WHO data indicated a suspected death toll of more than 139, with over 600 suspected cases, most of them in the Democratic Republic of the Congo, where 51 cases have been confirmed. At least two Ebola patients have been identified in neighboring Uganda.

"We know the scale of the epidemic is much larger," World Health Organization Director-General Tedros Adhanom Ghebreyesus said. "We expect those numbers to keep increasing."