Local media says the individual was wearing an explosive belt - the area has been evacuated and trains have been stopped.
Officers say the situation is under control and there are no other casualties.
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Dominique Meehan spoke after Keith Hearne, who is from Tallaght, was sentenced to 12 years in jail for her rape at a gaming convention.
On July 4th 2015, she was preparing a meeting room for a presentation as part of the Arcade-Con gaming convention she was volunteering at in the Crowne Plaza Hotel in Blanchardstown.
The court heard 28-year-old Hearne locked the door, rugby tackled her to the ground, tied her hands behind her back with his tie and raped her.
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DUP sources say the talks "haven't proceeded in the way they would have expected".
British Prime Minister Theresa May is looking for DUP support for a minority Conservative government.
The deal needs to be signed off before tomorrow's Queen's speech to the British Houses of Parliament.
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Commissioner O'Sullivan said the account, alleged to have be used for European money, was open between 1999 and 2010.
When she was first questioned, Ms O'Sullivan said the signatory to the account predated her term, and that of her predecessor.
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Residents in Sandymount in Dublin are protesting against the Poolbeg Incinerator this evening.
An investigation is underway at the plant - where 11 workers were temporarily hospitalised earlier this month after an 'unscheduled' discharge of lime.
Operators Covanta, and Dublin City Council insist there is no risk to public safety.
