He said the injured were rushed to Chuka County Referral Hospital, while the vehicles were towed to Chuka police station.
Mr John Mutegi, a resident who witnessed the accident, said it took them time to rescue the injured, especially the matatu driver from the wreckage.
One person died while four others were seriously injured after a 14-seater matatu collided head-on with a truck on Saturday evening.
The accident occurred near Njuri Boys High School along Chuka-Nairobi highway in Tharaka-Nithi County.
The matatu, belonging to Luxury Tours and Travellers company, was heading to Meru from Nairobi when it collided head-on with a truck.
Speaking to the Nation, Tharaka-Nithi County Police Commander Kegode Kidiavai said the driver of the truck, which was transporting cabbages, hit the matatu after losing control.