STATE COLLEGE, Pa. — A Pennsylvania man remained jailed Sunday after being accused by authorities of planning a mass school shooting for later this month that would have coincided with the anniversary of the Columbine High School massacre.

Police allege Braeden Phillips, 20, had planned to commit a mass shooting at State College High School in Central Pennsylvania on April 21, one day after the 26th anniversary of the deadly Columbine High School shooting, according to a criminal complaint.

Police allege Phillips had compiled a “hit list” and that the shooting would have taken place at around 8:40 a.m. — a high traffic time for students and staff — near the school’s main staircase. Officials cited in the complaint allege that Phillips planned to place bombs in the school bathrooms.

Phillips has been charged with conspiracy to commit murder and unlawful possession of a firearm. He was being held without bond at the Centre County Correctional Facility because he was deemed an “extreme danger to the community,” according to court records.

— The Associated Press