Thai police have arrested an Algerian national wanted in connection with the July 7 London bombings that had killed 52 people, a report said on Saturday.
Atamnia Yachine, 33, was arrested on Wednesday in the Soi Nana entertainment district of Bangkok on charges of possessing 180 fake French and Spanish passports, said The Nation newspaper.
Yachine is believed to have provided terrorists behind the London bombings with fake documents, said Immigration Police Commissioner Lieutenant-General Suwat Thamrongsrisakul.
Police were tipped off when an unspecified number of people were intercepted at Bangkok International Airport with 452 fake European passports earlier this month.
Thai authorities have yet to decide whether they will detain Yachine in Bangkok to further investigate his operations, or hand him over to the British government.
Thailand is a well-known hub for producing and selling fake documents.