From Haaretz:
Army Radio reported that at least one person was killed and 30 injured in an explosion in Rishon Letzion, either at a banquetting hall or a disco, on Sakharov Street in the town's new industrial zone.
Initial reports stated that the explosion occurred at around 11:00 P.M., and emergency service were at the scene minutes later. The injured were evacuated to the Sheba Medical Center at Tel Hashomer and the Ichilov Hospital in Tel Aviv.
Magen David Adom reported that there were dozens of injuries in the blast, which occurred on the first floor of the building, causing at least one upper floor, and possibly the entire building, to collapse. Reports state that several people are still trapped in the rubble of the collapsed building.
It was not initially clear whether the explosion was caused by a terrorist's bomb or some other source, although Army Radio said that it appeared to be the work of a suicide bomber.
An eyewitness who gave his first name as Oren told Israel Radio that he was near the scene at the time of the explosion. "I just ran away from there. I don't know if it's a terror attack," he said.
Prime Minister Ariel Sharon's advisers have been informed of the incident, and are deliberating whether to interrupt the meeting with U.S. President Bush to tell the two men about the explosion.