PETERS TOWNSHIP (KDKA) -- The teachers' strike in Peters Township is fueling tensions on both sides, and now authorities are investigating incidents involving dead animals.

The carcass of a deer was left near the picket lines outside of the high school Tuesday morning on East McMurray Road.

The deer was spray painted with the initials "PT" in the same colors that the union is using for its shirts and signage.

But this isn't the first incident involving dead animals.

Last week, a squirrel was thrown from a moving vehicle and a dead raccoon was left hanging from a road sign near the picket lines.

KDKA has confirmed that police are investigating the incidents.

Meanwhile, at least one representative from a parent group weighed in Tuesday night.

"There are a lot of upset students at the high school level, juniors and seniors, who cannot get letters of recommendation, they are not able to complete their AP courses and get transcripts sent to colleges and they are very upset and very angry," said Eric Tabor, a parent. "So, our instincts tell us this is probably the act of a group of teenagers."

KDKA's Kym Gable reached out to the teachers' union Tuesday, but has not yet heard back.

The teachers walked off the job on Oct. 28. And, if the last 20 days are any indication, the teachers will be back out walking the picket lines again Wednesday morning.

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