The attack Saturday at Pembroke
Bridge in Gilgil targeted Rigathi Gachagua's Democracy for Citizens Party
vehicle, with the driver briefly abducted, beaten, and teargassed before
release.
Gachagua blamed a 'Nairobi Sierra Killer Squad' tied to a state plot, amid rising tensions before Thursday's by-election for the vacant Ol Kalou parliamentary seat.
The race between DCP's Sammy Kamau Ngotho and UDA's Samuel Muchina Nyagah has seen IEBC warnings of violence and possible postponement, as both sides accuse each other of sabotage while residents worry about fair voting.