Three children at the Rothschild Early Childhood Center in Syracuse have been diagnosed with Salmonella.

Alicia Gross, the center’s director, said the Onondaga County Health Department does not believe food served at the center was the source of the infection. She said it may have been spread person-to-person. The health department is still investigating.

The health department said it is monitoring the situation on a daily basis to make sure the infection does not spread further.