Ten people, including one police officer, were killed when a gunman attacked a King Soopers supermarket in the Colorado city 30 miles northeast of Denver. All the victims have been identified; the youngest was 20 and the oldest 65. Police arrested the gunman, identified as 21-year-old Ahmad Al Aliwi Alissa from Arvada, Colo.

A Facebook post by Rabbi Fred Greene of Congregation Har Ha-Shem noted that his synagogue includes those who live in the neighborhood of the shooting.

“I know that we are feeling shock, fear, anger and so much more. I am sorry that as people were beginning to feel hopeful for [coronavirus] vaccines and a new beginning, another act of violence has shaken our community,” wrote Greene. “We are thinking of you who go to that area to shop. We are praying for the healing of those who are experiencing fear and trauma.”

Leaders of the Boulder JCC also expressed their sorrow and dismay regarding an incident of violence so close to home.

“Our hearts are with the Boulder community as the shooting at the King Soopers has unfolded before our eyes. We are shaken to our core, and we mourn the loss of life. Our thoughts are with the families of the victims, law enforcement and first responders who put their lives on the line for our beloved community,” said a social-media post signed by Jonathan Lev and Lee Strongwater, JCC’s executive director and board president.

“We are traumatized,” it continued. “This is our home, this is our grocery store. We have been there for each other throughout an incredibly difficult year. While we still don’t have many details on the shooting, we know there is more information to come in the hours and days ahead.”