The official said police stopped Ran Rosenzweie during a routine check last evening when he was roaming in Sonouli bus stand area. He was on his way to India from Kathmandu.
Rosenzweie was arrested by Sashastra Seema Bal (SSB) in Sonauli area as he was without a passport, SSB Commandant KS Bankhoti said.
A case has been registered and intelligence agencies have been informed, he said.