Hundreds of campaigners are protesting outside a dog breeding farm after animals were "removed".
'Camp Beagle', outside MBR Acres near RAF Wyton, Huntingdon called on supporters to attend a rally which began earlier this morning.
Cambridgeshire Live says a large police presence moved protesters away from the entrance on Tuesday before escorting two vans off the site believed to have been containing puppies.
Protesters claimed this was the first time they have seen beagles removed from the facility since they began camping out at the scene 40 days ago.
The protest has attracted hundred of supporters along with another rally at MBR Acres’ sister site near Hull, with around 200 attending, according to an eye witnesses
Protesters are demanding the release of the dogs and an end to the use of beagles in laboratory testing.
Cambridgeshire Live reports police are at the scene, but no roads are closed as yet.
A large police presence showed scores of protesters carrying banners being moved by police.
The crowd also carried drums and shouted slogans calling for an end to animal cruelty.
They could be heard shouting "shame on you" as they were corralled by officers.
Police also escorted vehicles which brought MBR Acres staff into the site.
In a live video from the 'Camp Beagle' Facebook page earlier this morning, one activist said: "There is no way Camp Beagle would want the dogs to be left - we would never stop workers getting in to look after those poor puppies."
She claimed the dogs had been left over night and the RSPCA contacted.
The shouts and loud protests continued as workers arrived at the facility.
Marshall BioResources, the owner of MBR Acres, told CambridgeshireLive in April: “We adhere to rigorous legislation through the strictest inspection routines for the breeding of laboratory animals at our facilities.
"Animal welfare is always our top priority.
“The UK has the most demanding regulations in the world – placing greater requirements on those who propose using animals in medical research than any other territory and demanding the highest welfare standards.
“The overwhelming consensus of scientific opinion is that animals are needed in a small percentage of medical research projects and that results from testing in dogs when combined with work in other species, provide data that best predict human responses to drugs.
"Governments internationally take note of this and legally demand the use of animals where science advises that it is necessary.
“This issue is revisited regularly because it is an important one, but it is worth remembering that we exist only because successive UK governments, including the current one, demand that all potential medicines are tested in animals before being given to humans and animals."
