The deaths occurred earlier on Thursday morning at Duka Moja area, near Ntulele.
Angry residents went ahead to block the main road from Mai Mahiu to Narok in protest over the deaths, saying the government was to blame for failing to arrest the perpetrators.
The protesters lit bonfires on the main road, causing a traffic snarl-up stretching over three kilometers on both sides of Duka Moja, inconveniencing road users, among them University of Nairobi students headed to Kilgoris to bury their colleague.