A group of children and chaperones fell ill aboard an American Airlines flight from Miami to Boston and had to be taken to the hospital on April 21, according to local reports.

The Boston Globe reported that 13 passengers who had traveled to Ecuador were evaluated at a local hospital after reportedly contracting food poisoning.

Boston EMT said in a tweet that it responded to the incident at Logan Airport, and that the passengers’ symptoms were “minor in nature.”

According to American Airlines, the incident appears to be contained to one single group. “No other passengers were ill. American requested paramedics to meet the aircraft upon arrival in Boston,” American Airlines told The Globe in a statement.

A woman told Boston 25 that the passengers appeared sick even before the flight took off. She told the news station that she sat beside a girl who became sick during the flight.

“It’s something they had before, because one of them was following me getting on the plane and we were waiting on the line but they were there in front of me and I saw that girl, she kept saying, ‘I feel sick. I feel sick’ and I don’t know, it was a bunch of them,” the woman, who didn’t want to be identified, told Boston 25.

The Globe reported the passengers who fell ill on American Airlines Flight 1201 were part of a larger group of about 40 people. They had reportedly all eaten at the same restaurant in Ecuador before flying back to the U.S. According to CBS Boston, five patients were released by 3 p.m. Sunday and were reported to be in “good” condition.