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More than 1,000 complaints have been made about Celebrity Big Brother to the media watchdog Ofcomafter just five days of it being on air.
They relate to when contestant Rodrigo Alves used the N-word in a conversation with another housemate.
Some viewers suggested Channel 5 should have removed him from the show for using the offensive word.
Producers gave him a "final warning" and said if he repeated the language he would be evicted from the house.
ackWetherill
Absolute joke that Rodrigo isn't being removed immediately for using the N-word. Big Brother should stick to their precedent (Emily in BB 2007) and get rid #CBB
— Jack Wetherill (@JackWetherill) August 17, 2018
Ofcom said it has received 1,048 complaints about the incident, which was shown on the second day of the reality TV show.
Rodrigo used the word when describing what kind of partner he preferred.
Ofcom is currently deciding whether action will be taken against Channel 5 for its handling of the incident.
"We will assess these against the broadcasting code before deciding whether to take it forward for investigation," it said in a statement.
buk
Big Brother does not tolerate the use of highly offensive, racially charged language in the House. Rodrigo has received a formal and final warning and if he uses such language again, he will be removed immediately. Rodrigo has apologised for his comments. #CBB pic.twitter.com/NX8scGPUkW
— Big Brother UK (@bbuk) August 17, 2018
Viewers have compared producers' response to Rodrigo's language to that of Emily Parra contestant who was on the show 2007.
She was removed five days into the programme after she used the same word in a conversation with housemates.
achelConroy2
Totally disgusted that Rodrigo Alves gets just a formal warning for his use of the n word yet Emily Parr got straight out booting in 2007. Double standards is not cool big brother. Don't want to watch antmore!
— Rachel Conroy (@RachelConroy2) August 17, 2018
'Stop rewarding this behaviour'
But it's not just Rodrigo's behaviour that's caused controversy on this year's Celebrity Big Brother.
Former Coronation Street actress Nicola Thorp criticised the inclusion of Hardeep Singh Kohli, Dan Osborne and Jermaine Pent on the showas all three have previously been accused of inappropriate behaviour towards women.
Hardeep was dropped from the BBC's The One Show in 2009 following a complaint of inappropriate behaviour from a female colleague.
In 2015 a recording of Dan apparently threatening to stab his ex-partner if she slept with another man was shared by UK tabloids. He later said he was sorry for the incident.
Jermaine wrote in his 2018 autobiography how Premier League footballers paid "rent" to each other if they slept with a woman that another footballer had had s3x within a game based on Monopoly.
"We must stop celebrating and rewarding this behaviour," wrote Nicola in a Twitter thread about Celebrity Big Brother.
"[Big Brother] has given both him [Hardeep] and Dan Osbourne a platform to attempt to redeem themselves in the public eye and to kick start their careers," she added.
"While women are still scared to report s3xual harassment at work for fear of ruining their own careers, Hardeep is taking money for having done it."
The programme has also upset viewers with a task based on Donald Trump's promises to build a wall between the United States and Mexico and the families who have been separated on the border.
ntoniajade_
Big brother is allowing people to say the N-word on national TV with no repercussions and mocking the wall trump wants to build which is causing immense pain and division for many families. What the hell are they playing at this year? ???? #CBBUK
— tone (@antoniajade_) August 19, 2018
The current series of Celebrity Big Brother on Channel 5 is the last in a three-year contract with the channel.
Newsbeat has contacted Channel 5 for a comment.