Police officers surround police constable Yvonne Fletcher after she was shot during a protest against Libyan leader Colonel Muammar Qaddafi in London, in this file photograph dated April 17, 1984.

British police said they had arrested a Libyan man on Thursday for the 1984 murder of policewoman Yvonne Fletcher who was shot dead outside the Libyan embassy in London.

Fletcher, who was 25, was hit by a shot fired from the embassy during a demonstration against Muammar Qaddafi. After an 11-day siege, 30 Libyans in the embassy were deported.

“This is the first significant arrest in this investigation” Richard Walton, who heads London police’s counter-terrorism command, told reporters.

Walton said a man in his 50s had been arrested in southeast England on conspiracy to murder and money laundering offences. A woman in her 40s and a man in his 30s, also Libyan, were also arrested for money laundering.

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