PHNOM PENH, Cambodia (AP) — Opposition demonstrators disarmed Cambodian security forces and beat them with batons and flag poles in a confrontation Tuesday that came two weeks before the anniversary of the disputed general election last year that led to a bitter political deadlock.

Officials said at least 40 people were injured, mostly security forces. Police arrested three lawmakers from the political party that led the protest to demand that Phnom Penh’s Freedom Park be reopened to the public, and later detained a fourth opposition politician who came to visit them at the police station where they were detained.