London Bridge terrorist Rachid Redouane had lived in Dublin
Khuram Shazad Butt known to police and MI5 and had been reported to anti-terror hotline
One of the London Bridge terrorists, who was carrying an identity card issued in the Republic of Ireland when he was shot dead, had lived in Dublin. He has been named as Rachid Redouane.
Scotland Yard named two of the three attackers on Monday. The other is Khuram Shazad Butt who was known to police and MI5.
It is thought Redouane lived in Rathmines in south Dublin as recently as the end of 2016. Redouane, 30, also used the name Rachid Elkhdar, claiming to be six years younger.
Butt, a 27-year-old British citizen born in Pakistan, and Redouane, who claimed to be Moroccan-Libyan, both lived in Barking, east London.
Assistant Commissioner Mark Rowley said Butt was known to the security services, but there was no evidence of "attack planning" by him.
Mr Rowley said: "While formal identification is yet to take place, detectives believe they know the identity of the attackers.
"They believe two of the men are Khuram Shazad Butt and Rachid Redouane, both from Barking, east London.
"All three men were confronted and shot dead by armed officers within eight minutes of the first call.
"Inquiries are ongoing to confirm the identity of their accomplice," Mr Rowley added.
Butt was known to the police and MI5, and a member of public had reported him to an anti-terror hotline.
The investigation into Butt was started in 2015, "however, there was no intelligence to suggest that this attack was being planned and the investigation had been prioritised accordingly", Mr Rowley said.
He added: "Work is ongoing to understand more about them, their connections and whether they were assisted or supported by anyone else."
It is not yet known how the two men named knew each other.
Of the seven women and five men arrested since the attack a man and a woman have subsequently been released.
Referring to Butt, Mr Rowley said one of the three was part of an investigation "prioritised in the lower echelons of our investigative work".
Detectives would like to hear from anyone with information about the men, particularly places they may have frequented and their movements in the days and hours before the attack.
At an event in Chicago, Taoiseach Enda Kenny said Redouane was not being monitored by gardai while here.
"There are a small number of people in Ireland who are being monitored and observed in respect of radicalisation and matters relevent to that," he told reporters after a talk at the Chicago Council on Global Affairs.
"In this case, these facts are being checked but my understanding is this individual was not a member of that small group."
Seven people were killed in London Bridge and Borough Market attacks on Saturday night. Of the 48 injured, 21 are critically ill in hospital.
Three terrorists brought carnage to the streets of London, moving down pedestrians with a van on London Bridge before stabbing a police officer and revelleres around Borough Market with 12in blades.
The three attackers, who were wearing fake suicide bomb vests, were shot dead by eight officers in an "unprecedented" hail of bullets. A bystander was injured when accidentally hit by a stray bullet.
RTE reported that authorities found an Irish identity card on the body of one of the suspects, believed to be of Moroccan heritage, indicating he had previously lived in Ireland.
Police chiefs in Dublin said they were liaising with counterparts in the UK.
"An Garda Siochana is providing every assistance to our colleagues in the London Metropolitan Police in relation to the terror attack in London," a spokesman said.
"We will process all requests from the UK authorities in relation to inquiries into individuals, identities or any other matter."
There are unconfirmed reports that he was married to a woman from Scotland and had lived in Dublin.
Gardai are investigating whether the ID card belonged to the dead man and if the documents are legitimate.
It is understood inquiries are continuing into whether the man was given an Irish ID card issued by the Garda National Immigration Bureau.
The plastic credit card-sized documentation is given to people from outside the EU. It has a person's certificate of registration which states they have permission to stay in Ireland. It must be carried at all times.
There are also inquiries into whether the man had been given paperwork after landing in the Republic to claim asylum or if he had an ID card issued under EU treaties which allowed him to live in Ireland with his family.
Garda Commissioner Noirin O'Sullivan was holding a meeting with the force's anti-terror and intelligence chiefs as they co-operate with the Met investigation.
Belfast Telegraph Digital