A high school was evacuated after suspicious objects were found in the building Wednesday, one day before final exams, authorities said.

The Passaic County sheriff's bomb squad removed the items, which may have been fireworks, from Wayne Valley High School and detonated them in a safe area, sheriff's spokesman Bill Maer said.

"They were definitely pyrotechnic in nature," Maer said. The investigation is continuing.

"We consider this very serious," he said.

Approximately four suspicious objects were removed from the school, Maer said. "Preliminary reports say they were found in lockers," he said.

Final exams at the school were scheduled to begin Thursday, according to the school's Web site, and classes end for the summer on June 21. The school is about 20 miles northwest of New York City.

New Jersey is among nine states that ban all consumer fireworks, but residents easily buy them in other states, including Pennsylvania. A New Jersey Senate committee last week approved a resolution asking Pennsylvania to ban sales of fireworks to out-of-state residents.