She added police told her they were unable to formally identify him until the coroner's releases a report on Tuesday.
Assistant Commissioner Mark Rowley said Butt was known to the security services, but there was no evidence of "attack planning" by him.
The Met said that family liaison officers had been deployed to support the families of the victims killed in Saturday's attack. "She had room in her heart for everyone and believed strongly that every person was to be valued and respected", said her family, who live in Castlegar in British Columbia, in a statement. London police say they can not confirm the names of people caught up in the attack. Police were trying to determine the third suspect's identity.
Butt associated with al-Muhajiroun, whose leader Anjem Choudary has been linked to the recruitment of more than 100 British terror suspects.
"We've made a decision to come from our mosque as a community, to say that none of this that has happened resonates with what we understand as Islam, and that we are very sorry for what has happened", she said.
Naming Butt and an accomplice, police admitted he was known to them and MI5, but that "there was no intelligence to suggest that this attack was being planned and the investigation had been prioritised accordingly".
According to the Scottish Daily Mail, one of the attackers worked on the London Underground even though he had appeared in an extremist documentary while another one kissed his baby goodbye before carrying out the attacks. Redouane, 30, had claimed to be Moroccan and Libyan.
"It is now clear that sadly, victims came from a number of nationalities".
She said Chrissy caught on very quickly in how to respond and understood how important relationships were.
An Irish security source described the killer as having "extensive immigration history related to the UK".
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.
"I am angry and furious that these three men are seeking to justify their actions by using the faith that I belong to", Khan said.
The role Khan is playing in the aftermath of the London Bridge terror attack that left seven dead and scores of people injured has been widely praised. Dozens were injured, many of them critically, in the attack that started on the London Bridge, when three attackers swerved the vehicle into pedestrians then, armed with knives, rampaged through Borough Market, slashing and stabbing anyone they could find.
Hundreds sheltered in pubs and restaurants, barricading themselves inside as the terrorists stalked the street. Another neighbor, Michael Mimbo, said he saw the van used in the attack near his home on Saturday, but didn't see who was behind the wheel.
NHS England said on Monday that 36 people remained in hospital, with 18 in a critical condition.
And dramatic footage has emerged showing a man running on a shop roof after police raided a road in East Ham.
A one minute's silence is due to be held across the country on today (June 6) in remembrance of the victims and those injured during the London Bridge terror attack Will there be a minute's silence for the victims of the London Bridge terror attack?