Sonitpur superintendent of police Sanjukta Parashar said two of the nationals were taken into custody today, while three others were nabbed from Tezpur Chanmari area yesterday and another from Thelamara area under Thelamara Police station.
Six others were also arrested in the last few days from Tezpur area along, he said.
They were all being sent to Kokrajhar Detention camp for deportation.
Five of the foreigners were identified as Rupa Pal, Chaya Pal, Sujata Pal, Sayob Ali and Nurul Amin, Parashar said.