PASADENA — Police are looking into reports of gunshots heard at three separate locations in the city late Monday, though no victims or suspects were identified, officials said.

Officers responded to reports of residents hearing gunshots at 5:42 p.m. in the 200 block of West Montana Street; 6:33 p.m. in at Allen Avenue and Orange Grove Boulevard; and at 7 p.m. in the 500 block of West Hammond Street, Pasadena police officials said in a written statement.

“(Officers) were not able to locate the shell casings or any other evidence (at any of the scenes) that would suggest actual gunshots were discharged,” according to the police statement.

No witnesses were able to provide specific information, and police suspected fireworks may have been involved, officials said. Two of the callers reported seeing a white Chevrolet Tahoe or another type of white SUV in connection with the shots.

The reports of gunfire took place throughout the city, but all the reports were taken near freeways, police said. California Highway Patrol officials did not respond to reports of shots being fired Monday evening.

The police investigation is ongoing.