"The search is still going on," KPKs spokesman Johan Budi said.
The KPK also searched the residence of a former PNRI director, identified by the initials as IEW, at Pondok Jaya Street 3, No. 24, in South Jakarta on Tuesday.
IEW, along with six other people, is currently subject to a 6-month overseas travel ban, which came into effect on April 25.
On April 22, the KPK named the director of demographic administration information management at the home affairs ministry, identified by the initial S, as a suspect in the case.
A consortium of companies, consisting of PNRI, PT Sucofindo, PT LEN Industri, PT Quadra Solution and PT Sandipala Arthaput, was the winner of the tender for the Rp5 trillion project at the home affairs ministry from 2011 to 2012.
Information about the alleged graft case came to light after the KPK received a tip-off from the public in 2012.
"This is the publics complaint. Of course, one of the pieces of information may have come from M. Nazaruddin, but the report did not serve as a basis for conducting the investigation. A group of people have reported it (the alleged graft case) to the KPK," Johan Budi said on April 22, referring to the former treasurer of the Democrat Party who is currently serving a prison term on a corruption conviction.
In September 2013, Nazaruddin informed the KPK about the alleged corruption in the procurement of E-KTP, including the alleged flow of funds to a number of House of Representatives (DPR) members.
The E-KTP program was carried out in 2011 and 2012.
The first phase of the program, which targeted 67 million citizens, began in August 2011. During the implementation phase, the program encountered several problems related to the availability and distribution of necessary instruments. (*)
Editor: Heru Purwanto
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