Stephen Harper's Conservatives are filibustering to block opposition efforts to launch hearings on policing at the Toronto G20 summit, accusing political rivals of seeking a platform to build sympathy for "thugs and hooligans" who rioted there.

Parliament is adjourned for the summer, and the opposition majority - the NDP, Liberals and Bloc - forced the Commons committee on public safety to reconvene on Monday to vote on whether to start federal hearings on the G20 security.

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