A TV presenter covering the Rio 2016 Olympics has been rudely interrupted on air – by a couple appearing to be having sex in the background.

The BBC’s Dan Walker, presenting the channel’s coverage of the games from the beach in Brazil, fought back the laughter as he tried to ignore what was going on behind him.

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But Walker was forced to address the awkward situation after viewers began tweeting in.

Eventually the presenter denied the passionate pair were doing “that” – but refused to let the camera zoom in as some on social media had suggested.

Instead, the 39-year-old insisted they were “having a hug” or “reading a book.... in a strange pose”.

It is hard to see exactly what the couple were doing, as the footage was filmed at night.

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The presenter was rudely interrupted live on the air by a couple appearing to have sex in the background

But social media users seemed to have made up their mind and began chipping in with gags.

Most of the jokey comments were aimed at Walker’s seemingly implausible explanations for what the couple were up to, if not “that”.

Dean Wallman wrote: “He better be careful or he'll get sand stuck between his pages.”

Robert Middleton tweeted: “Absolutely brilliant. Are you trying to convince the public or yourself they're reading?!”

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And Chris Crocker said: “Is that what u were told as a boy? 'Why is the door locked mum?' 'Your father & I are just reading a book son.”

It is not the first time Walker has been interrupted on the BBC’s sandy Rio set.

Last week the presenter was harassed by a Brazilian hen party live on the air.

The rowdy girls refused to leave, cheering and chanting until Walker was forced to negotiate, allowing the hen onto the set.

And earlier this week, a man was seen peeing in the sea behind the BBC man as he talked through the day’s sporting action.

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