Sashastra Seema Bal (SSB) personnel detained them yesterday when they failed to produce valid documents to prove their identity, SSB sources said today.
Those detained include two women and four children.
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During interrogation, they told SSB personnel that they belonged to Jammu and Kashmir and were coming from Kathmandu.
The SSB, which guards the 1,751-km long Indo-Nepal border, and local police are verifying their claims.