Officials are linking the suspects to Lashkar-e-Taiba, a Pakistan-based terror group blamed for the 2008 Mumbai, India, attacks that killed 166 people.
The suspects stole passports from tourists and sent them to Thailand to be doctored and distributed to groups linked to al-Qaeda, authorities said.
Officials said the group had also supplied forged documents to other groups, including the Tamil Tiger rebels who were defeated in 2009 by Sri Lankan troops.
The Associated Press contributed to this report.
