In line with the Public Health Act Cap 242, the county government of Kiambu has closed Ruaka market.
In a notice signed by sub-county administrator David Mugo, the market will remain shut until further notice.
This, he said, will allow relevant authorities to fumigate and clean the area.
This comes just hours after Health CS Mutahi Kagwe announced 11 new cases of COVID-19, 4 these were Ruaka residents.
Mugo has advised traders to clear their stock and observe social distancing and proper hygiene while at home.
This he said as he cautioned those living outside the capital city that COVID-19 is not a Nairobi disease.