THE Joint parliamentary committee on the Defence and Foreign Relations and the Administration and National security will start investigations into the Westgate Mall terror attack today.
Three unidentified members of the public will be the first to appear before the committee.
It will be co chaired by Tiaty MP Asman Kamama and Tetu's Ndung'u Githinji.
Kamama said the three individuals hold crucial information on the attack.
Sources at the committee told the Star that Nairobi Senator Mike Sonko will make appearance tomorrow.
Yesterday Sonko declared that he was ready and "rearing to appear" before the committee and shed more light on the September 21 attack.
The committee summoned the Senator after he told the Senate last week he had passed crucial information to the National Intelligence Service and the police on the impending attack but it was not acted upon.
The committee has scheduled their investigations to run for a month.
This week the committee will hear testimonies from members of the public with information related to the attack which killed more thanr 70 people.
Next week, the committee will summon all the security chiefs including Inspector General of Police David Kimaiyo, Director of Criminal Investigations Ndegwa Muhoro and Interior Secretary Joseph ole Lenku.
Others will be the department of Immigration, Kenya Defense Forces chief Julius Karangi and NIS director general Michael Gichangi.
To wind up the week, Forensic and terrorism experts will be invited to help make clear the incident which has left many questions unanswered.
In the final week, the committee will visit areas where major attacks have occurred in the recent past. They include Garissa, Moyale, Wajir, Mandera,Mombasa and the Kakuma and Daadab refugee camps.
The inquiry starts amid calls from leaders for the overhaul of security agencies. Yesterday, Kericho senator Charles Keter told the Star that the government and the parliamentary committee will carry out quick an independent investigations and promised that those who will be found responsible will be prosecuted.
"As the inquiry begins I want to assure the people of Kenya the government and the committee will carry out thorough and investigations to unearth the criminals behind the mall attack. Innocent people were killed therefore those responsible will be prosecuted," he said.
Last week, Kamama, who chairs the committee on Administration and National Security said the committee's report will be tabled in the House in a month's time.
The MP assured the public that the report will be independent and "no stone will be left unturned" warning that those who will be found responsible will be "dealt with accordingly".