Squatters have entered and occupied a house in London that is believed to be owned Saif al-Islam Gaddafi, son of the Libyan leader, according to the Metropolitan Police.

An activist group calling themselves Topple The Tyrants have taken over the £10-million property in Hampstead Garden Suburb in north London. They said they will remain there until they are confident the property's assets will be duly returned to the Libyan people.

Police were called to an address in Hampstead Garden Suburb at approximately 12:50pm today to reports of unknown people entering the premises, a Scotland Yard spokesman told Agence France Presse.

At this time this is being treated as a civil matter. There have been no arrests. Police are monitoring the situation and safer neighborhood reassurance patrols are taking place in the area.

The activist group said in a statement: We didn't trust the British government to properly seize the Gaddafi regime's corrupt assets, so we took matters into our own hands.

“When we found out one of the world’s most brutal dictators owned property in North London it seemed like an obvious thing to occupy it for the people of Libya. Our aim is to make sure that the assets stolen by Gaddafi are returned to the Libyan people and don’t disappear into the pockets of governments or corporations. In the meantime we want to welcome refugees from the conflict in Libya and those fleeing tyranny and oppression across the world. We stand in solidarity with the Libyan people.

The neo-Georgian mansion reportedly has eight-bedrooms, an indoor swimming pool, a sauna room and a cinema room.

The group also stated the property was managed by the Gaddafi family through a holding company registered in the British Virgin Islands.

We will stay here until we can be sure the property will be returned to its rightful owners, the group's spokesman, Montgomery Jones told the BBC.

The police came to look around, then went away. The house isn't occupied at the moment but there are things to sit on.

Last week, The British government has already frozen assets owned by Moammar Gaddafi and his family.