File Photo – Highland Park High School | Photo: Google Street View

Authorities are investigating after some students at Highland Park High School received messages on their phones indicating a shooting threat at the school.

The Highland Park Police Department responded Thursday to Highland Park High School, 433 Vine Avenue in Highland Park, for a report of a threat.

City officials said officers were told that two students had received text messages indicating the threat of a shooting at the high school.

The texts were apparently received Wednesday evening.

School staff informed the police immediately upon learning of the information, city officials said.

Police were first made aware of the threat around 12 p.m. Thursday and responded with additional staff to initiate the investigation.

The threat was specific to Highland Park High School but the police department is increasing patrols at all Highland Park schools.

City officials said it is important to report concerns or threats as soon as possible to law enforcement by calling 911.

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The investigation into the incident remains ongoing.

Earlier Thursday morning, the Zion-Benton District 126 issued a precautionary hard lockdown at Zion-Benton Township High School following a “vague threat” made against the school.

The school district said just after 10 a.m. that the lockdown had been lifted and classes would resume their normal schedules.

Authorities did not say whether the Highland Park and Zion threats were believed to be related or not.