The Big Brother house has been thrown into lockdown after fans reportedly threw tennis balls over the garden walls.
Housemates were ordered to wait inside after the major security breach while security teams swept the site.
The tennis balls were deemed a potential security risk as producers for the ITV2 show did not know what they contained.
A source told The Sun: ‘The housemates were rushed into the house as tennis balls began flying over the compound walls and into the garden.’
‘Producers leapt into action and ordered them into the house and locked the doors.
‘The housemates are on lockdown as the teams secure the site.’
This comes after one of the ‘biggest rows ever’ was seen when new arrivals Jedward clashed with Lynx.
The Irish models and musicians, who first appeared on Celebrity Big Brother in 2011, are back in the civilian house this year.
However, the duo clashed with Rhianna over her relationship with Omar and Lynx, who is smitten with Chelsea.
In a clip, John told them: ‘Yous aren’t in Love Island. Just letting yous know. For real… This is Big Brother, just always remember that.’
The brothers also told Chelsey that she needs to ‘look in the mirror’ and ask ‘Who am I?’
After telling Lynx what had happened, he confronted Jedward in a hot tub, where they began to splash him with water.
As he shouted, ‘Are you insane?, Lynx walked off while branding them ‘idiots’.
The series, which is proving to be a hit with viewers, has also featured several other arguments.
Since last weekend’s launch, a ‘fat-shaming’ row erupted between Rochelle and 19-year-old Millie.
Millie discussed her gastric sleeve surgery and was told she needed to ‘put her mind to it’ about losing weight.
Metro has contacted ITV and Big Brother for comment.
Big Brother airs on ITV at 9pm.