AMBRIDGE, Pa. – Concerns about chaotic protests led by the state teachers union at a Donald Trump rally scheduled for a school field house today forced local officials to end classes earlier than planned.

The American Federation of Teachers Pennsylvania, which has endorsed Democratic presidential candidate Hillary Clinton, is planning an anti-Trump protest across the street from the Ambridge Area High School field house today with several other groups, including National Organization for Women, Women of Steel, and congressional candidate Erin McClelland, KDKA reports.

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Trump is scheduled to speak at the field house at 3:30 p.m. today, and school district officials initially planned to dismiss students about 30 minutes early at 2 p.m., but concerns from parents and local law enforcement over planned protests forced officials to reconsider, according to The Times.

On Sunday afternoon, district officials sent out a message over Facebook, phone calls and emails to parents, and the district’s website that classes will instead be dismissed at 11 a.m. for high school and junior high students and noon for elementary students.

“District officials have been monitoring the planning with law enforcement since last week and met on Friday with (the) Secret Service and local law enforcement and were satisfied with the planning to date,” according to the notice to parents.

“Again, today, Sunday, district officials have observed planning at the field house (and) are satisfied with the level of national, local and district preparations,” it continued.

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The notice also stressed that “no student will be required to attend or encouraged to attend this rally,” The Times reports.

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“I think I probably would have voted for cancelling, but I understand it may have been hard for them to not make up that day somewhere else in the school year,” parent Jessica Whitaker told KDKA.

Ambridge police spokesman J. Mann also believes school officials should have canceled classes entirely for the rally.

“My advice to them is to don’t have school on Monday because it’s going to be a logistical nightmare with the school buses,” he said.

Regardless, several students who spoke with KDKA said they plan to stick around the school after classes let out.

“I’m going to see Trump,” one young man told the news site.

Another young woman said “I kinda just want to see both sides, to see who I support more.”

The change in the student dismissal time came after Democratic state Rep. Bob Matzie complained about potential safety concerns at the high school where his daughter attends classes, a call he amplified after an audio tape of Trump making crude remarks about women surfaced on Friday.

Matzie said the public “should demand answers” from school board members who opted to lease the field house to the Trump campaign for the rally, an agreement that undoubtedly predated the audio tape scandal.

“The decision to dismiss students at 11 a.m. was validated by the Ambridge police chief, who also suggested parents use their discretion and keep kids home as a safety precaution,” Matzie told The Times. “While I still maintain that school should be closed, I believe releasing students earlier in the day is better, but does not fully address the potential traffic and safety issues.”

Roughly 3,000 Trump supporters are expected to attend the Monday rally, while about 1,000 protestors – many undoubtedly teachers released from class early – are expected to protest the Republican candidate from across the street, KDKA reports.