Raila Odinga and Kalonzo Musyoka were accompanied by NASA principals Musalia Mudavadi,Moses Wetangula and lawyer James Orengo.
President Uhuru Kenyatta is also expected to arrive at 3p.m.
Wafula Chebukati had last week requested to meet the principals as the commission was not making any headway with the representatives that were sent to the earlier meetings.
Currently the IEBC is in talks with NASA who were already present at the venue.
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