"The two senior officers have not been charged yet, but they were arrested in connection with the shooting at demonstrators," Jayakody said. "Investigations are under way."
A 22-year-old man was critically wounded at the protest and is on a life support system in hospital, sources said. About 12 policemen were among the 150 people wounded.
The authorities swiftly withdrew the pensions bill and declared a holiday in Katunayake to defuse tension after thousands of workers took to the streets.
The government had proposed taking over provident fund contributions of private sector employees and paying them a smaller pension after retirement.
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