A suspected double bomber on the FBI's most wanted list who vanished for 21 years is due in court this week to determine if he will be sent back to the United States to face trial.

The FBI believes Daniel Andreas San Diego has links to animal rights extremist groups and is their prime suspect for a series of bombings in the San Francisco Bay Area in 2003.

Former FBI agents stated there were missed opportunities to arrest the 47-year-old before he vanished and claimed a suspected bomb-making factory was found in his abandoned car after a 65-mile chase in California.

Mr San Diego was found 5,000 miles away in a cottage in north Wales last year.

Mr San Diego, who had a $250,000 bounty on his head, faces a five-day extradition hearing at Westminster Magistrates Court in London to find out if the UK will hand him over to the United States to answer a federal arrest warrant.

The former fugitive, the first born-and-raised American on the FBI's most wanted terrorist list, has been indicted for maliciously damaging and destroying by means of explosives after two attacks in 2003.

Animal rights extremist group Revolutionary Cells - Animal Liberation Brigade claimed responsibility for the attacks on firms believed to have links with organisations testing products on animals.

Former FBI Special Agent David Smith was part of a group surveilling Mr San Diego. He noted that the suspect appeared unremarkable yet managed to evade detection for years.

After his arrest in November 2024, the FBI Director stated: No matter how long it takes, the FBI will find you and hold you accountable. Mr San Diego has declined to comment while being held at Belmarsh Prison in London.