This was confirmed by his Personal Assistant and Information Officer, Honour Siranwo.
Senator Abe had led members of Save Rivers Movement, to a venue where they were to hold an inauguration and thanksgiving programme for the Obio-Akpor Chapter of the group.
Governor Rotimi Amaechi was expected at the event before the incident occurred.
In his reaction, Chief of Staff, Government House Port Harcourt, Tony Okocha said the police wants to militarize the state.
Okocha said the Save Rivers Movement had applied to the state police command.
According to him, the Supervising Minister of Education, Nyesom Wike, orchestrated the attack. He also alleged that he bribed the Police Commissioner in the state, Joseph Mbu to carry out the attack.
According to report, the police shot sporadically and released tear gas to disperse the crowd.
In the meantime, Senator Abe is lying critically in the hospital.