A flight from the Dominican Republic to Canada was diverted to Fort Lauderdale overnight because some passengers complained about getting sick.

The Broward County Sheriff’s Office said that eight passengers were taken to Memorial Regional Hospital in Hollywood as a precaution after Air Transat Flight 477 landed at Fort Lauderdale/ Hollywood International Airport about 11 p.m. ET.

“It was not an emergency landing. It was simply a report of sick passengers on board,” said Greg Meyer, public information officer for the Fort Lauderdale-Hollywood International Airport, according to the National Post.

“Due to the multiple symptoms and unknown illness” authorities alerted local health authorities, the Centers for Disease Control and Prevention, the sheriff office’s homeland security unit and federal customs officials, the sheriff’s office said, according to CNN.

The ill passengers turned to be family members who had eaten together. The CDC determined that their illness was not airborne and not contagious, CDC representative Lola Russell said. Something the passengers ate or drank must have caused them the illness, she added. They remain hospitalized until their health state improves.

About 230 other people on the plane were evaluated and cleared to continue their flight to Edmonton, Alberta, the sheriff’s office said.