A person went on a stabbing spree at Rutgers Business School on Friday afternoon — slashing at least two people and sending the campus into a lockdown, authorities said.

School officials issued an alert over Twitter at around 3 p.m., urging students to “avoid the area” and “take shelter.”

Cops arrested a suspect about 45 minutes later and eventually gave the all-clear, according to CBS.

Pictures posted online showed police canvassing the Piscataway campus as students took cover.

It is unclear what sparked the stabbings. Cops are still investigating.

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