Arjuna Ranatunga has been arrested by the Colombo Crimes Division (CCD) over the shooting incident near the Ceylon Petroleum Corporation (CPC) premises, last evening.
Police sources said Ranatunga was arrested for unlawfully entering the CPC premises, triggering a tense situation that led to a shootout.
A security of Ranatunga, a member of the Police Special Task Force (STF), has also been arrested over the same incident.
Meanwhile, SLFP unions of the CPC called off their trade union action immediately after Ranatunga was arrested.