Kenyan police on Monday vowed to enhance massive operation to flush out illegal immigrants in Eastleigh residential estate in the wake of bomb and grenade attacks in the restive Nairobi.

Regional police commander Moses Ombati said some of the bombs and grenades attacks which have been hurled in the estate which is mainly occupied by Kenyans of Somali origin are prepared elsewhere only to be ferried to Eastleigh to inflict terror on innocent people.

"We have mounted massive clean up operation in the Eastleigh following the recent terror attacks in the area. We have conducting house to house search with a view of getting illegal immigrants who frequent the area," Ombati told Xinhua in Nairobi.

At least five people have so far died while nine others injured by the attack which took place last Friday. Local lawmaker, Hassan Yusuf who was among worshipers from a mosque after prayers, suffered limp injuries and is recuperating at the hospital.

Kenya has blamed Somalia's Al-Qaida-linked Al-Shabaab militants for a spate of attacks in Kenya in recent years especially in Nairobi, Mombasa and northern regions.

However, the insurgents have not publicly claimed responsibly for the recent attacks which sparked inter-ethnic violence for the two days on Nov. 19-20.

Dozens of people were injured during the clashes between ethnics Somalis blamed for increased grenade and bomb attacks in the city and Kenyans residing in neighboring slums.

The East African nation has experienced a string of attacks on churches and public places in the recent past, blaming them on the insurgents from Somalia who have vowed to attack Kenya because Kenyan military forces entered Somalia last year to fight against the group.

While consoling Yusuf on Sunday, Vice-President Musyoka condemned the grenade attack and urged Kenyans not to despair, assuring that the government will not be moved and will continue to be alert through its intelligence network.

He condoled with the families of the deceased and wished the legislator who is said to be stable and those who were injured quick recovery.

The vice president reassured that the government is doing everything possible to protect its citizens and urged all people in the country to help the police in identifying Al-Shabaab sympathizers and other criminals living amongst them.

"There is need for all of us to be calm and it is crucial that Kenyans embrace the spirit community policing by reporting any suspicious looking person either in public transport or any other place," he said.

The Vice President assured the Kamukunji residents that the MP is stable and will soon be out of hospital.

Officials said most Somalis had fled designated refugee camps and were now roaming in the country causing insecurity, particularly in Eastleigh and the border town of Garissa which have witnessed high cases of terror attack.

But Ombati said more than 100 illegal immigrants have been arrested since Dec. 6 when an improvised bomb went off on the roadside, killing one person before a grenade was hurled at a mosque on Friday night killing five people.

"We want to concentrate door-to-door operation in Eastleigh for sometime. We want to establish what has been going on in the estate for sometime. We want to acquaint ourselves with whatever takes place there," Ombati said.

Ombati said the police have managed to arrest some illegal immigrants who appeared tin court on Monday.

"Those we arrested are over 100. We found them without proper documentations meaning they are in Kenya illegally. We have investigation them and were taken to court today where we expect the court to decide their fate," Ombati said.

He said some of those arrested are refugees who have from refugee camps and "our enhanced operation will ensure that refugees are taken back to where they belong".