The officer was stabbed in the back and neck on the public side of the Bishop International Airport’s main terminal, according to the Transportation Security Administration.
The police officer, identified as Lt. Jeff Neville, is stable, David Kaiser, a spokesman for the Michigan State Police, told CNN.
All passengers are safe and were evacuated, the airport said on Facebook. A law enforcement official said the stabbing appears to have targeted law enforcement.
The FBI has not made any determination but is investigating whether the airport stabbing is terrorism, a law enforcement official told CNN.
Police posted on Twitter that the airport will remain closed until further notice.
Michigan Gov. Rick Snyder and Flint Mayor Karen Weaver responded to the stabbing with words of support for officers.
As we wait to learn more about the incident at Bishop Airport, please keep the attacked officer in your thoughts & prayers.
— Governor Rick Snyder (@onetoughnerd) June 21, 2017
“(P)lease keep the attacked officer in your thoughts & prayers,” Snyder said on Twitter.
“My thoughts and prayers are with all of our law enforcement officers who work to service and protect us each and every day,” Weaver said in a statement.
The airport’s Police Department has six full-time and six part-time police officers. About 800,000 passengers took flights through Bishop last year, according to statistics from the airport.