Lawrence Township police said it was investigating the call made to Rider University Public Safety.
Alerts started at about 1:15 p.m. and the lock down lasted about an hour.
"There is no active shooter situation on campus at this time," Lawrence police said at about 2:15 p.m.
“We will share more info with you ASAP. Investigation is ongoing," the university said in a statement canceling the shelter-in-place.
Anyone with information regarding this threat is asked to contact the Lawrence Township Police Department at 609-896-1111.
More information will be provided as the investigation continues, said Lawrence Police Chief Chris Longo
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