An explosive device was located and detonated by police sappers overnight Tuesday in the gynmasium of a high school in the central Israeli town of Petah Tikva.
"Someone crossed a line; cynical use was made of the gymnasium (but) disaster was averted," said the Israel Police's Central District Commander Bruno Stein.
The police had received a tip-off that an explosive device meant to be handed over to criminals had been placed at the school. Sniffer dogs were then sent into the building to locate the bomb.
"The immediate action taken by the unit prevented a real danger to the school's students and faculty, who were at the school without knowing that an explosive device was there," police said.
Two 31-year-old men were arrested, one a school employee suspected of arms and drugs trafficking and the other suspected of drug trafficking.
Local residents expressed shock that a bomb had been found in the town. "Had the device detonated, hundreds of people would have been killed," said one man.