The station's Commandant Arun Kumar said that the police and Intelligence Bureau were accordingly informed and the four were taken to Keoti police station after preliminary questioning at the base, he said.
Additional Superintendent of Police Dilnawaz Hussain confirmed the detention of the four. The youths had come to Darbhanga to sell warm clothes.
Darbhanga was considered sensitive from security point of view as Yasin Bhatkal, the co-founder of banned outfit Indian Mujahideen who was arrested in 2013, had stayed in this north Bihar town for quite a long time.

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