Melvin Cravitz, 66, died from multiple stab wounds and fellow worshipper Adrian Daulby, 53, was killed by a bullet fired by armed police as he blocked the doors of the Heaton Park Hebrew Congregation Synagogue when Jihad Al-Shamie, 35, tried to get in on 2 October 2025.
Al-Shamie, a Syrian-born UK citizen, was shot dead by police while carrying out the attack on the holiest day of the Jewish calendar. Three other people were seriously injured.
Announcing the inquiry, Mahmood said: "What happened that day must be fully understood." She said the inquiry would "ensure that all evidence can be heard, including any sensitive national security material that could not otherwise be fully heard in the coroner's court."
The announcement comes after it emerged that police had seized Al-Shamie's mobile phone, containing details of his extremist mindset, but did not analyse the contents until after he had attacked the synagogue.
"In recent days, we marked the first anniversary of the terror attack at the Heaton Park synagogue," Mahmood said. "On that awful day in October of last year, as our Jewish community celebrated Yom Kippur, two brave men, Melvin Cravitz and Adrian Daulby, lost their lives, and three others were seriously injured."