The Chairman of the Garda Siochana Ombudsman Commission (GSOC)says his meeting with the Justice Minister over spying claims was fruitful.

Alan Shatter called the meeting today after a Sunday newspaper report that the GSOC office on Abbey Street in Dublin had been bugged.

Meanwhile the Taoiseach Enda Kenny is calling on the Garda watchdog to level with the Justice Minister.

It was claimed yesterday that GSOC has been the target of a sophisticated surveillance operation using what is described as government-level technology.

The allegations have caused widespread shock and concern in political circles today.

The Justice Minister, who was unaware of the claims, has held a meeting with the GSOC Chairman Simon O'Brien.

The Taoiseach earlier called on the Garda Ombudsman Commission to "level with" the Justice Minister over their claims their offices were bugged. Enda Kenny says he is concerned at the allegations and wants a report to Cabinet in the morning.

He says the equipment allegedly used is available widely on the market, though it is expensive. The law also requires that the Justice Minister should be informed of such matters.

Enda Kenny says the fact he was not is concerning.

Earlier, the Tanaiste said the claims were "sinister" and "unacceptable".

Speaking in Brussels this morning Minister Gilmore says he will await the briefing from the Justice Minister Alan Shatter tomorrow before saying anymore.

The Communications Minister Pat Rabbitte also said it is highly unusual that the alleged incident was not reported to the Justice Minister.

Minister Rabbitte told reporters he wants to hear what his Cabinet colleague finds out.