Dr Matiang’i, who spoke in Nakuru County on Wednesday during the opening of an e-passport immigration centre, said they were in the country illegally.
The minister said all foreigners working as small traders in the country will be deported.
Dr Matiang'i also vouched for the government’s current work permit policy, describing it as “the strictest in Kenya’s history”.
During the launch of the immigration centre, the CS revealed that at least one million Kenyans have obtained the new generation e-passports ahead of the August 31 deadline.
Interior Cabinet Secretary Fred Matiang’i has ordered the deportation of four Chinese nationals engaging in business activities at Gikomba market in Nairobi.
Dr Matiang’i, who spoke in Nakuru County on Wednesday during the opening of an e-passport immigration centre, said they were in the country illegally.