An Air France flight bound for Detroit was redirected to Canada after a passenger from Congo boarded “in error” amid the Ebola outbreak in central Africa, officials said Wednesday.

A U.S. Customs and Border Protection spokesperson said the agency took “decisive action” by prohibiting the flight from landing at Detroit Metropolitan Wayne County Airport.

“Due to entry restrictions put in place to reduce the risk of the Ebola virus, the passenger should not have boarded the plane,” the CBP spokesperson said in a statement.

Montreal Trudeau International Airport directed request for comment to Air France, which confirmed that Flight 378 was diverted “at the request of U.S. authorities” after it departed Paris on Wednesday, landing in Montreal shortly after 5 p.m. ET.

“There was no medical emergency on board, and like all airlines, Air France is required to comply with the entry requirements of the countries it serves,” an Air France spokesperson said in a statement.

The Centers for Disease Control and Prevention announced Monday that the U.S. will restrict entry for people without U.S. passports who were in Congo, South Sudan or Uganda in the last three weeks. The restriction is in effect for the next 30 days.

In a notice submitted to the Federal Register published Thursday, CPB and the Department of Homeland Security announced new arrival restrictions directing all flights to the U.S. with passengers who have recently traveled to Congo, Uganda or South Sudan to land at Washington-Dulles International Airport in Virginia.

The restrictions begin Thursday and apply to any person who “has departed from, or was otherwise present within,” the three countries “within 21 days of the date of the person’s entry or attempted entry” into the U.S., according to the document.

Dulles was described as the airport “where the U.S. government is focusing public health resources to implement enhanced public health measures.”

In a statement, a spokesperson for DHS said in an effort to reduce the risk of the Ebola virus spreading to the U.S., enhanced screening, monitoring and response activities are in place. “CBP is continuing to coordinate with airlines, international partners, and port-of-entry officials to identify and manage travelers who may have been exposed to the Ebola virus,” the agency said.

In its statement, Air France acknowledged the new restrictions.

The suspected death toll from the Ebola outbreak totals more than 139, with more than 600 suspected cases, most of them in Congo, according to the World Health Organization.

A vaccine for the Bundibugyo strain of the virus — which is driving the outbreak — is most likely months away from human trials, and there is no guarantee it would work, the WHO said Wednesday.