The 7 victims of the London attack will be remembered with a minute's silence at 11AM in the UK.
Two of the three attackers have been named as Khuram Butt and Rachid Radouane with Rachid previously living and marrying in Dublin.
He was a pastry chef who moved to the capital in 2012 and got married to his British wife here.
He lived in an apartment in Rathmines, eventually moving back to the UK.
He made several trips back and forth with the last one believed to be in 2016.
He never came to the attention of gardai and officers are now investigating his movements.
Meanwhile a minutes silence will be held across London today for the victims, while police are continuing searches in the city.
Yesterday evening, London mayor Sadiq Khan condemned the barbaric terrorists and vowed not to let them alter Britain's way of life.
All 12 people who were arrested after Saturday night's attack have been released without charge.
Seven women and five men were detained in Barking in the east of the city following a series of raids.