British police will seek the extradition of an Algerian man arrested in Thailand on suspicion of forging European passports.
British police have one month to make a case for extradition
Atamnia Yacine, 33, was detained in the Thai capital Bangkok on Wednesday, after he was found with at least 180 French and Spanish passports.
Britain has a warrant for his extradition on charges of forging passports and money laundering.
Thailand is widely reputed to be a major source of fake travel documents.
Yacine was arrested during a raid on his house in Bangkok.
A Scotland Yard spokesman said: "We understand the individual has been detained in Bangkok."
"We will be working with the Crown Prosecution Service, the Foreign Office and the Thai authorities to seek his extradition."
British police will have one month to present their case to authorities in Bangkok.
Thai police said the seized passports had been sent to the French and Spanish embassies for examination.
Western governments view Thailand as a hub for fake passport production and proliferation, the BBC's Jonathan Head said from Bangkok.
Security analysts say that is a major concern, as they can be used to allow criminals and in some cases militants to move freely between countries.