Police in Ol Kalou have mounted a manhunt for a 27-year-old man suspected of brutally killing his siblings and injuring two children during a knife assault at Mundi Estate on Thursday night.

According to Nyandarua Central Subcounty Police Commander Samuel Kamau, the suspect allegedly killed his 29-year-old sister on the spot before turning on his younger brother, aged nine, who later succumbed to injuries while receiving treatment at JM Kariuki Hospital.

The attack, which occurred at around 8 p.m., also left two other children wounded. One was treated and discharged, while the other remains admitted at JM Kariuki Hospital.

Police say the motive of the brutal assault is yet to be established.