BALTIMORE (WJZ) — Reports of gunshots near the Johns Hopkins medical campus puts the entire school of public health on lockdown. No injuries were reported, but detectives did find evidence that a gun was fired.

Meghan McCorkell has more on the scare for this large medical community.

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Police have cleared the scene at the Johns Hopkins medical campus after thousands of employees were placed on lockdown for approximately 30 minutes.

It all started around 8:30 p.m. Monday when someone reported hearing gunshots near the campus coming from the 1700 block of E. Monument Street.

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A text message and email alert was sent out to Hopkins employees, warning them to shelter in place.

City police flooded the scene, but did not find a shooter or a victim.

Monument Street was blocked off for some time as investigators combed the scene.

All police will say is that there is evidence someone fired a gun in the area, though no suspects have been arrested.

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Hopkins officials say the lockdown was called out of an “abundance of caution.” It was lifted around 9 p.m.