The SSB personnel stopped them at Indo-Nepal border yesterday and on checking they were found holding Pakistani passports but no Indian visa, Second Commandant (SSB) Arvind Kumar said today.
On being stopped at the border they had claimed that they belonged to Jammu and Kashmir and were coming from Kathmandu, he said.
They were identified as Alija (38), Mohammad Rafi Bhat (40), Suhek (12) and Noor (8).
In the wake of Hyderabad blasts, security agencies have stepped up vigil along the Indo-Nepal border to prevent any untoward incidents.