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The Evanston Police Department reports that it has a suspect in custody regarding an explosive device found outside the rear of the police outpost at 633 Howard St.

A statement released on June 19 by the police department says that on June 18, the Evanston Police received information about a possible explosive device planted at the outpost. Detectives from the Investigative Services Division investigated the tip and the information appeared credible, according to the statement.

Bomb technicians from the Cook County Sheriff’s Police Department responded to the scene and located an explosive device in the rear exterior of the building. Bomb squad technicians rendered the device inoperable and notified the Chicago Fusion Center about the incident. Agents from the Bureau of Alcohol, Tobacco, Firearms and Explosives responded and assisted in this investigation, according to the statement.

Police took a person of interest into custody on June 18. Based on the person’s statement and other evidence, police say it “it appears that the subject in custody acted alone and that no other explosive device was placed.”

Evanston police turned the suspect over to federal authorities late in the afternoon of June 19. Further information will be released after charges have been filed, according to the police statement.