The man accidentally shot dead during the Manchester synagogue attack was holding the doors shut to make sure the knifeman could not enter, says rabbi Daniel Walker.
Police revealed earlier that one of the two victims died from a police bullet, fired as officers shot dead Jihad al Shamie.
Rabbi Walker told Sky News: "One of the men was murdered entering into the synagogue from the outside on his way to pray, he was coming for morning services, Yom Kippur, and his life was taken.
"The other man was inside the foyer, helping hold the doors to stop the terrorist coming in and when shots were fired he was fatally wounded.
"That was Adrian, who was holding the doors to make sure everyone inside stayed safe."
Adrian Daulby's family have described the 53-year-old a "hero" and a "down-to-eart