His close friend Kirika Githaiga posted details about the accident.
"From what we are getting, Chege was driving along Northern Byass when He saw a Bodaboda riding in the wrong direction, To avoid a head-on collision, He swerved only to hit road barriers, His car spun and landed in a ditch some few meters away," a statement read.
Githaiga had also appealed for blood donation before he later announced the aspiring politician had succumbed to his injuries.
"Our brother urgently needs blood.Hon. Steve Chege Senator Laikipia County. is admitted at Kenyatta University Referral Hospital, needs blood donations.All blood types are welcome to donate. Contact Geraldine Muiruri on 0712121500, or Kirika Githaiga for more details. Say a prayer for our brother."
Section of UN-Avenue, Runda closed by KURA over flooding