Stones shattered its windows, with witnesses describing scenes of panic as the journalists scrambled for safety.
An RMS journalist has also injured and rushed to hospital after being struck while filming the procession.
The convoy, initially on the Eastern Bypass, was diverted to Enterprise Road before returning to Mombasa Road. Leaders accompanying former DP includes Senator John Methu(Nyandarua), Joe Nyutu Murang'a), Karung'o Wathang'wa (Kiambu), Kirinyaga Woman Rep Njeri Maina, Embakasi South MP Julius Mawathe, former Starehe MP Maina Kamanda among others.