Voting is underway in the Ol Kalou parliamentary by-election, a high-stakes contest seen as the first major political test in the Mt. Kenya region since former Deputy President Rigathi Gachagua's split with President William Ruto.

• Nine candidates are vying for the seat, with the main contest between UDA and Gachagua's Democracy for Citizens Party (DCP).
• Over 1,000 police officers have been deployed to ensure security at the constituency's 114 polling stations.
• The by-election has been marked by accusations and counter-accusations, including allegations of voter suppression tactics by the UDA camp.