Morning top 5: Garda whistleblower controversy, Hutch murder probe and Oberstown strike

The top stories this Tuesday morning...

Former garda commissioner Martin Callinan is facing growing calls to confirm or deny allegations that he tried to discredit garda whistleblower Maurice McCabe in a secret meeting with Fianna Fáil TD John McGuinness.

Last night, the current garda chief Nóirín O'Sullivan denied any knowledge of the private meeting between her predecessor and the former chair of the Public Accounts Committee.

The issue is expected to be raised in the Dáil this afternoon. 

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A woman in her 40s is to appear in court this morning charged in connection with the latest gangland murder.

Gareth Hutch (35) was shot dead outside his home in Dublin's north inner city last Tuesday.

The woman due in court is being charged with withholding information that could have prevented a serious offence.

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Justice Minister Frances Fitzgerald is to look for extra resources to help gardaí tackle gangland crime.

The Fine Gael will tell this morning's Cabinet meeting that we need so-called "saturation policing".

As part of the plan, the minister wants to create a "mini" Criminal Assets Bureau created to clamp down on smaller offenders.

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Staff at the Oberstown youth detention centre in Dublin will start a series of work stoppages this morning.

IMPACT and SIPTU members are taking action over staffing and safety concerns.  

Workers will walk off the job for four hours today and again every Tuesday for the next four weeks.

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North Korea has failed to launch its Musudan missile for the fourth time, South Korea claims.

The Yonhap News Agency said the North attempted to test fire the intermediate-range weapon from its east coast in the early hours.

North Korea is thought to have up to 30 such missiles, which could reach as far as US military bases in Asia and the Pacific.