An American Airlines flight was forced to land at Raleigh-Durham International Airport Sunday afternoon after passengers experienced nausea and headaches. The airline originally said the plane landed and was evacuated because a passenger “passed gas,” but later claimed it was due to a “medical call," reported WNCN Sunday.

Flight 1927 from Charlotte to RDU landed at 2:21 p.m. Sunday, according to airline spokeswoman Lakesha Brown. All passengers were evacuated from the plane. An official said a passenger “passed gas,” which caused those aboard the flight to become sick, resulting in the forced landing and evacuation. Brown specified that the odor was caused by a medical issue.

Read: American Airlines Flight Reportedly Delayed For Hours Over 'Urine Smell'

American Airlines spokesperson Ross Feinstein later released a statement Sunday night saying the odor was not because of “passed gas,” contrary to what the airline had stated previously in the day.

“We did have an aircraft from Charlotte to RDU this afternoon, that landed at 2:19 p.m. ET, and arrived the gate at 2:21 p.m. ET, that is currently out of service for an actual mechanical issue — an odor in the cabin. But it is not due to ‘passed gas’ as mentioned.”

This story was the latest bodily substance-related oddity to occur on an American Airlines flight this month. An American Airlines plane flying from Los Angeles International Airport to Washington Dulles International Airport on July 9, 2017 was delayed for more than four hours because of a supposed urine smell. The Washington Post columnist Dana Milibank live-tweeted the event.

“Classic @American Air — after 14 hr flight from Sydney w/3 exhausted kids, LAX-IAD flight delayed hours because...plane “smells like urine.”

American Airlines said the reason for the delay was a “cleanliness issue.”

Read: American Airlines Crew Forced Passenger To Sit Next To Masturbating Man, Woman Claims

“Flight 2645 from LAX to Dulles on July 9, was delayed due to a cabin cleanliness issue,” American Airlines said in a July 10 statement to International Business Times. “We brought in a new aircraft and the flight departed approximately 4.5 hours late. We apologize to our customers for the inconvenience.”

In a July 9, 2017 Medium post, a New York City woman said a man sitting next to her on an American Airlines flight from New York City to Paris masturbated while she was asleep. When Chloe King woke up, a flight attendant told her what happened, but she was allegedly told to go back to her seat.

The airline said they were looking into how they handled the situation and that they reached out to King directly, according to Gothamist.

Before American Airlines claimed Sunday's evacuation was not due to a passenger who “passed gas,” several news outlets already reported the incident.