The police team, which had arrived here on June 17, caught the four near the enquiry counter on the intervening night between June 17 and 18.
The four were identified as NT Shanti Nitai (Assam) and L Jiten Singh, K L Inocha Singh and K B Babo Singh (all from Manipur), he said.
They were produced before the railway magistrate who granted 10 days remand to the Manipur police team, which left for the north eastern state with them last night, he added.