Five Eritreans were on Wednesday morning arrested along Isiolo-Moyale Highway, in Samburu East Sub County.
The aliens accompanying two children were headed to Nairobi driving a personal vehicle with registration number KCR 731H (NISSAN SERENA).
"Police manning a roadblock at Kirish area along Isiolo-Moyale highway arrested seven aliens of Eritrean nationality who gained entry into the country illegally," County police commander Mr Karanja Muiruri said.
Muiruri said the Eritreans lacked valid travel documents and permits to be in the country.
Police impounded their vehicle and recovered an unknown amount of money in different currencies.
The five and two minors are currently being held at Samburu East Archers police station.
Mr Muiruri says they will be charged with being in the country unlawfully.