A Dutch airline was forced to apologise for the third time in a week after social media users shared an email appearing to be homophobic.
The airline had already kicked off controversy last week, after it told a customer breastfeeding passengers may have to cover up if other passengers were offended.
In a screenshot of the email, a customer services person from the airline appears to be implying that breastfeeding parents could be approached by a crew member if they offend another passenger, as would a same-sex couple.
"If needed the cabin crew can approach the said party and base on the response (sic) they were given, then they would act and respond appropriately," the email says.
KLM said that kind of response would be entirely inappropriate and it's investigating the email.
"We take this very seriously," the airline said in a tweet.
"We're currently investigating this reply as it totally doesn't represent our official point of view at all. We completely understand this reply is offending (sic) and we distance ourselves from it."
A spokesperson for the airline confirmed the investigation was taking place when approached by The Telegraph.
Earlier last week, KLM India received an online backlash after tweeting where passengers would be least likely to die in a crash. They later removed it after questions were raised over its appropriacy.