Protesters greet Indonesian President in London

London: The President of Indonesia met Queen Elizabeth II on Wednesday during a visit to Britain that was marred by protesters accusing him of human rights abuses.

Susilo Bambang Yudhoyono and Indonesia's First Lady Ani Bambang Yudhoyono were welcomed by the Queen and her husband Prince Philip in a ceremony at London's Horse Guards Parade.

The two couples then took part in a state carriage procession to Buckingham Palace, where the visiting couple will stay during their three-day visit.

About 50 demonstrators holding placards that read "Stop killing Papuans", protested the Indonesian leader's visit outside Prime Minister David Cameron's residence on 10 Downing Street. They claim Yudhoyono has committed crimes of humanity against tribal people in West Papua.

Rights groups including the New York-based Human Rights Watch have said that Indonesia's military is responsible for some of the violence in Indonesia's restive Papua province, home to a decades-long low-level guerrilla war. Yudhoyono has conceded that Indonesian security forces had overreacted at times but said the attacks were "on a small scale with limited victims”.

Later on Wednesday, two human rights activists tried to reach Yudhoyono's car but were stopped by police. Scotland Yard confirmed that they arrested one man for attempting to disrupt the leader's visit.