Abdullah was brought to Lucknow on a transit remand and produced before a court which sent him to five days police custody, an ATS spokesman said.
Abdullah who was arrested from Kutesara locality in Charthawal area of Muzaffarnagar. He is said to be associated with Ansarullah Bangla Team (ABT) and was allegedly involved in preparing fake identity proofs of terrorists, especially from Bangladesh and help them find safe hideouts in India.
ABT is an Al-Qaeda inspired Islamic extremist group, according to officials.