Photos of the Police and Fire Memorial, outside the Ridley Township Municipal Building, show someone poured dish soap into the fountain causing it to foam over.
Though most of it was cleaned up by Tuesday morning, there were still some suds in the water.
New Jersey state police are also on the lookout for the suspect or suspects who vandalized a memorial for a fallen trooper along State Highway 83 in Dennis Township, Cape May County.
Police say someone used white caulk to write a derogatory phrase on the pavers and to deface the granite monument on October 7.
On September 26, video captured two women who stopped at a memorial site along the Schuylkill River Trail honoring fallen Plymouth Township Officer Brad Fox, who was killed in the line of duty in 2012.
In the video, you can see one of the two women desecrate the memorial by throwing a flag into the weeds nearby before taking off.
Anyone with information about these incidents is asked to contact police.