Four officers with the Pittsburgh Bureau of Police who were injured while responding to the deadliest attack on Jews in United States history are reportedly recovering, according to USA Today.

Two officers have been released, while two remain at an area hospital—one of whom is listed in critical condition in the intensive care unit. The other officer still in the hospital is listed in stable condition.

Officers were hit during the gunfight with the suspect at the Tree of Life Synagogue on Saturday morning.

Officers pinned down the gunman and took 46-year-old Robert Bowers—who also suffered gunshot wounds in the exchange—into custody.

"They're all heroes," Pittsburgh Police Chief Scott Shubert said, "Who knows what would've happened if he got out in the streets."