Corruption watchdog ICAC launches High Court bid to defend powers

The NSW corruption watchdog is launching a legal bid to defend its own powers after the Court of Appeal shut down its probe into crown prosecutor Margaret Cunneen.

The ICAC says it will also now hold off filing two politically charged corruption reports following Friday's ruling.

The Court of Appeal has blocked its investigation into claims Ms Cunneen perverted the course of justice over a roadside breath test involving her son and his girlfriend.

The commission will now seek special leave to challenge the decision before the High Court as a matter of urgency.

The ICAC reports cover hearings which have so far claimed high-profile Liberal scalps, including former NSW premier Barry O'Farrell and federal assistant treasurer Arthur Sinodinos.