A third-grader at Stanley M. Makowski Early Childhood Center made a threat against the school in a 911 call Wednesday morning, putting it into lockout mode.
"Police have determined that the threat is eliminated and the building is secured," Buffalo Public Schools spokeswoman Elena Cala said in an email shortly after 10 a.m.
The lockout at the Jefferson Avenue school also had been lifted, Cala said. During a lockout, schools secure their perimeters because of a perceived threat outside.
The threatening call was made just before 8 a.m. while the student was aboard a bus, officials said, declining to provide any detail about the nature of the threat.
Police were able to track down the caller by pinging the caller's cell phone, she said. Police also searched the building.
A Buffalo police spokesman confirmed the situation has been resolved.