Jazz FM has apologised after the station broadcast audio of what appeared to be part of a gay porn film on Saturday night.

The station called the incident, when a few minutes of audio footage was broadcast, "highly regrettable."

“Unfortunately we had an unauthorised access to the live feed this evening which resulted in a highly regrettable incident.

“Please accept our profound and sincere apologies for any offence that may have been caused.”

Listeners challenged the station on the social media site twitter, asking just after 7pm on Saturday evening:

@kbbanks1
K

@jazzfm what on earth is playing over your sky digital channel, I suggest you sort it out now. Disgusting

February 18, 2012 7:21 pm via Twitter for iPhone Reply Retweet Favorite

The radio station soon apologised on twitter, saying:

@jazzfm
jazzfm

I'm truly sorry but we have had a major hack into the feed - engineers looking into it now, once again profound apologies.

February 18, 2012 8:33 pm via Mobile Web Reply Retweet Favorite

But not everyone was offended by the early evening unexpected broadcast, with one user tweeting:

@RadioWatcher
RadioWatcher

I wish Jazz FM was that interesting every night...

February 20, 2012 12:30 am via Twitter for iPhone Reply Retweet Favorite

Head of programming Miki Vitti said: “There was unauthorised activity and behaviour in the studio which we take very seriously and we will be taking the appropriate disciplinary action against the individual concerned.

“In addition I will apologise to the Jazz FM audience at the beginning of next week's programme.”