Massive police investigations took place near three schools in Miami on Wednesday after threats were made that were later determined to be hoaxes, according to investigators.

Miami-Dade Schools Police said that an anonymous person called 911 on Wednesday morning and told law enforcement that they were going to harm students.

The caller did not specify if they were targeting Kinloch Park Elementary School or Kinloch Park Middle School, but both schools were locked down as a precaution.

West Miami Middle School, which is located nearby, was also put in lockdown as a precaution.

“We needed to lock the door and go into the bathroom,” Fifth grade student Elias told CBS News Miami. “The teacher told us to be quiet.”

A handful of law enforcement agencies responded to the scene, including the City of Miami Police, the Miami-Dade Sheriff’s Office and the Florida Highway Patrol.

A helicopter was used to search the area from above, too.

Now one parent told CBS News Miami that they need to explain what happened to their young children.

“You got to let them learn that this is not a game,” one parent said. “That something very serious could happen.”

Miami-Dade Schools Police said they are still working to determine who made the hoax call, and reminded everyone that making threats like these are a felony.

No injuries were reported during the incident.