Police were warned about the Manchester synagogue terrorist four years ago, according to reports.
A resident living close to Jihad al-Shamie, 35, claimed they reported him to Greater Manchester Police during lockdown after becoming concerned about radicalisation.
A former neighbour, who was fostering two Afghan children, said Al-Shamie had tried to preach the Koran to them.
While she did not go to the police, another local who lived in the same street alleged she flagged up concerns with the officers but did not get a response, The Daily Telegraph reported.
The neighbour told the Times that a line was crossed when he began “preaching to two kids” in the street adding that she dialled 999 and “reported the house” to police.
“They didn’t come back to me. I remember making the call and speaking to Greater Manchester Police,” the neighbour added. “Even though I’d grown up with the family, I still reported it because it wasn’t right.”
Victim Adrian Daulby, 53, leaped from his seat to block the doors of Heaton Park Hebrew Congregation Synagogue in Crumpsall as knife-wielding Jihad Al-Shamie, 35, tried to get in to attack worshippers last Thursday morning.
Mr Daulby was killed along with Melvin Cravitz, 66, as the rampage unfolded on Yom Kippur, the most holy day in the Jewish calendar, with many worshippers inside.
GMP previously said there is no record of Jihad being known to counter terrorism police, the security service or Prevent but the force was “still investigating” reports regarding his family members.
A force spokesman told the Standard: “We are aware of reports circulating which suggest Jihad Al-Shamie had previously been reported to police due to concerns over possible extremist behaviour.
“This is inaccurate. We stand by the previous statement that Jihad Al-Shamie was not known to Counter Terrorism Policing.”
One resident in Prestwich, who declined to be named, told the newspaper: “He was just like a normal western guy.
“He wasn’t worshipping Islam, he would go to the Northern Quarter and talk to me and my partner every single day, chatting forever.
“All of a sudden, lockdown happened and he started rocking up in his robes, which is fine, but it wasn’t his way.
“They weren’t practising Muslims, the family. The kids were allowed to do what they wanted. And we got really worried, my partner and I, because [after lockdown] they weren’t even making eye contact with us.
“So then I reported it because he was apparently preaching to two kids in the street as well as about the Koran. Just weird things. So I reported the house.
“They didn’t come back to me. I remember making the call and speaking to Greater Manchester Police, that’s all I know. I dialled 999.
“Even though I’d grown up with the family I still reported it because it wasn’t right.”.
She also told BBC News: “My partner and I were really worried. [The relative] stopped speaking to us, talking less and less and spending all his time praying.
“He wouldn’t even make eye contact with me.”
The woman - who still lives nearby - told how as a teenager Al-Shamie had suffered a serious head injury on a family holiday and was flown abroad for treatment.
She described Al-Shamie as appearing stricter than the rest of his immediate family living in a small cul-de-sac on Langley Crescent and she became concerned he was influencing his relatives.
Other local residents described Al-Shamie, who was on bail for alleged rape at the time of the attack, as appearing “unfriendly” and “not a nice person”.
One described overhearing him swearing on the phone to another man while sitting in his Kia Picanto and then winding up the window when he saw her leaving her house.
Two men, aged 30 and 32, and a woman, 61, all arrested in Prestwich, and a 46-year-old woman held in Farnworth remain in custody being questioned on suspicion of terror offences.
Two others - an 18-year-old woman and a 43-year-old man - were released with no further action on Saturday night.
