A Delta Airlines flight attendant at Buffalo Niagara International Airport was not allowed to fly Wednesday morning after he was spotted acting in a manner that a security officer deemed unfit for flight, according to authorities.

A Transportation Security Administration officer at a security checkpoint noticed the male flight attendant's irregular behavior and alerted Delta Airlines personnel, TSA spokeswoman Lisa Farbstein said.

Both the NFTA and Delta officials said the matter did not rise to the level of a security issue. There were no passengers aboard the Atlanta-bound plane when the attendant was removed.

"It was Delta's decision to remove the flight attendant from flying," said Gina Laughlin, a Delta spokeswoman.

The TSA officer's allegations against the flight attendant are now under review by the airline, she said.