The aliens were found in a residential area where police believe they were hiding.
Ruiru OCPD Isaac Thuranira confirmed the incident where he urged the area residents to cooperate with police as they enhance their security.
A caretaker and two other men who were delivering food to the suspects were also arrested.
The Government has maintained that the operation will continue despite calls from human right groups and politicians to stop it claiming that it was only targeting a particular group of people.
On Thursday, President Uhuru Kenyatta warned politicians to desist from disrupting police work including the ongoing terror crackdown.
He said the crackdown was only targeting criminals and not a community or a specific religious group.
The President who was presiding over the passing-out parade of more than 3,000 Administration Police recruits in Embakasi said the government will act firmly against criminals who have claimed many lives of innocent Kenyans.
“Let us allow police do their work, we all need security,” he appealed.
More than one hundred aliens have since been deported to their countries since the operation started.
“We should not politicise security; it is important and should be given the prominence it deserves,” the President said while assuring police officers of his Government’s support if they carry it out as per the law.
Interior Cabinet Secretary Joseph Ole Lenku has since defended the police of any wrong doing saying the operation was being carried out in a professional manner.
“To those who continuously break the law, involve themselves in criminal activities or terrorism activities, they have a reason to worry,” he stated during AP pass out ceremony on Thursday.
“The writing is on the wall …we will not do our work to their wishes but as provided in the law to make sure that we protect our society from those who engage in unlawful activities.”