The two brothers and their two cousins had gone to visit a relative in Kitengela for a housewarming party and to celebrate the birthday of one of them.
Unbeknown to them was that it would be the final journey for Fred Mureithi, 30, his younger brother Victor Mwangi who was celebrating his 25th birthday, and their two cousins Mike George, 29, and Nicholas Musa, 28.
At around 6pm, the two brothers left to look for a place they could buy chicken in Kisaju but a stop near a riverbank at Enkamulyat area, some 14km from Kitengela town, was where death lay in wait.
Residents who saw motorbikes parked by the riverbank thought the owners were out to steal their cattle.
They raised an alarm and without listening to the young men's plea, speared the four to death.
The area which is commonly referred to Kitengela Reserve has had cases of cattle theft.
Names of senior officers who perished alongside General Francis Ogolla – President Ruto