The minister was on his way to Dublar Char to attend Rasmela, a Hindu religious festival.
However, Jessore Superintendent of police, Anisur Rahman said: “A public transport may have knocked people down .”
When contacted, Kamal’s Personal Secretary Harun-Ur-Rashid said: “I heard about the incident. An unaffiliated car that had trailed behind our motorcade may have hit some people when taking a turn.”
Of the injured, four were identified as Sonia Begum, 24, Asma Begum, 35, Anjira Begum, 45 and Birendranath Datta, 48.
Witnesses said a car in the VIP motorcade rammed people who were waiting at a bus stop around 10:20am on Sunday.
The injured were admitted at Abhaynagar Upazila Health Complex.
Three were reported to be critically injured and later shifted to Khulna Medical College Hospital.
Locals could not identify who the motorcade was escorting. But some locals gathered on Jessore-Khulna highway protesting the incident. Later, Nawapara Municipality Mayor Sushanta Kumar Das went to calm the protesters.