Nine were women and 32 men, with 22 of them being Chinese and 19 Taiwanese.
Security officers led by the Director of Criminal Investigations Ndegwa Muhoro raided the house, where they recovered several communication equipment among them 14 laptops and eight mobile phones among other gadgets.
Muhoro said police are pursuing the owner of the house and a Kenyan who brought them to the country.
“According to their passports, they had been given three-month tourist visas. What they are doing is not in line with tourism,” he said. “We are yet to know what they were up to.”
The first foreigner in the batch arrived in the country on February 18 this year while the latest arrived on April 1, 2016.
Police acted on a tip off from members of the public who had noticed “suspicious activities going on within the compound hosting them.”“According to their passports, they had been given three month tourist visa. What they are doing is not in line with tourism,” he said. “We are yet to know what they were up to”
