Jerusalem ? A bomb blew up a commuter bus during morning rush hour today near the northern port city of Haifa, killing at least eight people and injuring 20 others, according to initial police reports.

“Apparently the Palestinian terrorists’ appetite for terror has yet to be quenched,” said David Baker, a spokesman for the office of Prime Minister Ariel Sharon.

One witness, identified only by his first name, Motti, told Israel Radio he was driving about 60 feet behind the bus when he heard the explosion and saw the bus fly about six to 10 feet in the air.

“It’s a catastrophe. Shrapnel and bits are everywhere,” he said.

Police officials told The Associated Press that eight people were killed and 20 were wounded. They also said that they believed a suicide bomber blew up the bus.