LONDON — British Prime Minister David Cameron has told the country's intelligence agencies to investigate the Muslim Brotherhood, amid reports the group is using London as a base to plan militant activities after a crackdown in Egypt.

"The prime minister has commissioned an internal government review into the philosophy and activities of the Muslim Brotherhood and the government's policy towards the organization." Cameron's office said Tuesday.

The Brotherhood has long had a presence in Britain, but the government is investigating whether its ranks have been swelled by members fleeing Egypt.

Muslim Brotherhood leader Mohammed Morsi was ousted as Egypt's president last year, and Egypt has declared it a terrorist organization.

The Brotherhood insists it is a peaceful organization with no links to violence.

Among the questions for Britain's investigation is whether the group was behind a bomb attack on a tourist bus in the Sinai peninsula that killed three South Koreans and the Egyptian driver.

Britain's investigation will be led by John Jenkins, Britain's ambassador to Saudi Arabia a country that has joined Egypt in declaring the Brotherhood a terrorist organization.