“If I look at what we had, which all of us complained about, it could not have stopped what took place,” he told CNN. “It’s ironic that we did have such a warning, and we did have some measures.”

He said people were told to park away from the entrance and had to go through a metal detector. But he said the attackers came through a back entrance.

“They knew what they were doing, and they did not go through the front. All of our arrangements are in the front,” he said.