Pittsburgh Rabbi Jeffrey Myers said Monday that hate "just seems to be getting worse" in the aftermath of a mass shooting at his synagogue, which left 11 people dead.

Myers said on NBC's "Today" show that he feels "a mixture of anger, disbelief, all rolled into one."

"Am I really experiencing this? Is this just some horrific nightmare and I’m going to wake up? Was this just some cruel drill the FBI had us do to practice?" he asked.

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"All of those things go through simultaneously. And then I saw that there is hate, and it isn’t going away. It just seems to be getting worse," Myers added.

“There is hate, and it isn’t going away. It just seems to be getting worse.” -Rabbi Jeffrey Myers pic.twitter.com/sxBLxWcCGW — TODAY (@TODAYshow) October 29, 2018

Myers also described hearing the shooting unfold while he fled to make a 911 call.

“I heard him execute my congregants," he said. "I didn’t watch it, I couldn’t watch it. I called 911. I was the first caller, and I stayed on the line for what seemed like an eternity. They say it was about 20 minutes."

“I heard him execute my congregants. I didn’t watch it, I couldn’t watch it. I called 911. I was the first caller, and I stayed on the line for what seemed like an eternity.” -Rabbi Jeffrey Myers pic.twitter.com/nenvSUW7Z2 — TODAY (@TODAYshow) October 29, 2018

Myers said he went into a bathroom, where he stayed until a SWAT team came and rescued him.

The suspected gunman, Robert Bowers, 46, was later arrested and charged with 29 counts in the shooting deaths. He is expected in court on Monday.