FONTANA ( — A report of shots fired at a Fontana middle school Friday was likely the result of a student prank, police said.

Dispatchers received a call shortly before 11 a.m. from an unidentified male about a report of an active shooter on campus at Heritage Intermediate School located at 13766 Heritage Circle, according to a Fontana Police spokesperson.

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The caller claimed his daughter – who is a sixth grade student at the school – was hiding under her desk due to the reported threat, police said.

Dispatchers called the school and spoke to staffers, who said the school was on lockdown but that no active shooter had been identified, according to police.

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After checking the campus with the help of school staff, Fontana police confirmed that an unknown student had gained access to the school’s public address system and used the system to yell for “students in all classrooms to get down,” police said.

The campus was placed on lockdown and students began texting their parents that they had been placed on lockdown due to an active shooter situation, according to police.

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An investigation was ongoing to determine the identity of the student who committed the apparent prank, police said.