Green Party activists in Brighton Pavilion were caught ripping UKIP adverts out of copies of the Brighton and Hove Independent.
They were captured on closed-circuit television by a security camera at Sussex Heights as they tore the front-page ad out of dozens of copies of the free weekly newspaper.
The newspaper has uploaded the video to YouTube where it has already been viewed more than 18,000 times in a few days.
To read the newspaper’s report of the incident, click here.
The newspaper said: “Quickly and neatly, they tore out every single one of the UKIP advertisements. One suggested they could come in handy as toilet paper. Another said she was not so fracking desperate.
“It sounded like fracking, anyway.”
The activists were in town to support the campaign to re-elect Caroline Lucas as the Green MP for Brighton Pavilion.
When the newspaper showed the video to party officials, the response was: “We know that passion is important in politics. But however strongly we oppose the policies and rhetoric of UKIP, we will condemn any attempt to prevent them from having their fair say in this election.
“Opposition is crucial to democracy and something we have consistently championed. If these campaigners are connected to the Green Party, we apologise, as their actions in no way reflect its values or position.”
Kevin Smith, UKIP’s parliamentary candidate for Hove, described the incident as “absolutely disgraceful”.
He said: “This is yet another attack on UKIP election material, of the sort that is a common occurrence. Only this time the culprits have been caught red-handed.
“All the other parties – not just the Greens – are desperate and don’t want to discuss UKIP. They like to portray us as undemocratic and racist. Which are complete lies.”
Clarence Mitchell, the Conservative candidate in Brighton Pavilion, said: “This just confirms the very ugly, anti-democratic depths to which Green activists will often stoop in continuing to inflict their political vandalism on Brighton.
“They are far from the idealistic, peace-loving environmentalists that many still fondly imagine them to be.”