Four men were killed on Monday afternoon at Kinanduba village, Igembe Central while three others were hacked to death in Tigania East on Saturday.
The fighting is between Borana and Meru communities.
According to Red Cross, two youths were shot dead by suspected Borana bandits at 1pm while ferrying milk along Maua-Garbatulla road.
Central Eastern regional manager Gitonga Mugambi said the attackers ambushed the two and stole their motorbikes after murdering them.
In a retaliation, the Meru's attacked two businesses people at Kiutine market and stabbed one to death .
Those displaced have pitched camp at Kathithine primary school where Red Cross plans to attend to them.
Gitonga urged the residents both from Meru and Isiolo to be calm and keep peace.
The Star: Kennedy Kimeli