On returning from a trip to Israel, New York’s Metropolitan Transportation Authority security chief Louis Anemone and Port Authority police chief Joseph Morris warned that bus bombings are coming to New York.

“This stuff is going to be imported over here,” Mr. Anemone said. “It already has, and I want people to sit up and take notice.”

The two chiefs had gone to Israel to learn about that country’s counter-terrorism programs. Their comments were originally reported in the Jerusalem Post.

The MTA declined to make Mr. Anemone available for further discussion and the Port Authority cited “security concerns” when it chose not to make Mr. Morris available to discuss his comments.

Mr. Anemone said the lack of cooperation between agencies allowed Al Qaeda to get a foothold in America. He said Israel is the model of interagency cooperation. “If they can do it,” he said, “why the hell can’t we?”