The BBC's press office has issued a statement after sex noises were heard on air during a live broadcast.
The noises were heard during the pre-match build up ahead of Liverpool's FA Cup third-round replay victory over Wolves at Molineux. Presenter Gary Lineker was left red-faced by the incident, which appeared to be the result of a phone taped to the back of the studio set.
Lineker himself described it as a "quite amusing" sabotage, while a prankster has claimed credit for the act. There was also a quick response from the BBC, too, with a statement put out during the half-time break.
"We apologise to any viewers offended during the live coverage of the football this evening," a statement from a spokesperson read. "We are investigating how this happened."
Co-commentator Alan Shearer had joked that the phone belonged to studio pundit and former Liverpool midfielder Danny Murphy. "The floodlights going off, Danny Murphy's phone going off in the studio; what else can happen?" he quipped.
YouTuber Daniel 'Jarvo' Jarvis claimed to be behind the prank, live streaming the whole episode. "Here we are, we have set up a phone with a loud sex noise in the BBC studio at the Wolves versus Liverpool FA Cup replay," he said on the stream.
What did you make of the prank? Have your say in the comments section.
On the pitch, Liverpool came out on top in a game of few chances. The initial game at Anfield ended two apiece, with a late Toti winner ruled out for offside, but one goal was enough for the FA Cup holders this time around.
Harvey Elliott was the match-winner, scoring his fifth goal in Liverpool colours. His effort from outside the box flew beyond Jose Sa to put the visitors in front inside 15 minutes, and the hosts had no way back despite the best efforts of manager Julen Lopetegui.
"It feels like ages ago we had a feeling of winning and playing well," Liverpool manager Jurgen Klopp told BBC One. "We had to fight hard at the end which we controlled for long periods. It is great and the reaction we wanted to see.
"It was good from Harvey Elliott, especially after an early knock to the ankle. he fought through and the goal was exceptional. I had a few man of the match performances today. We played a really good first half, had good periods in the second and in the end, it was just passion to block the shots. A cup game, great.
"From the passion we showed, yes. It is my job to help the boys and find the formation where they feel good from the start. Stefan Bajcetic and the whole midfield was really compact, so it was difficult for Wolves to find the key players like Joao Moutinho. I liked the game a lot."