LEWISTON, N.Y. -- New York State Park Police dispatchers say a small area near Artpark's main stage was evacuated temporarily Tuesday evening after two bomb-sniffing K-9's detected a possibly dangerous material near a speaker.

As a precaution, State Park Police, the Erie County Bomb Squad, and the Federal Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) responded to the Lewiston facility.

Randy Bachman and 54•40 were scheduled to play for this week's "Tuesdays in the Park" performance. Long lines waited outside the park while police and other officials checked out the scene.

State Park police said after a thorough investigation, which involved X-raying the equipment in question, the scene was determined safe and the concert was allowed to resume.

Just after 8 p.m., Artpark tweeted necessary safety checks had been completed, and the concert was about to continue. Artpark also said its curfew was extended to 10:30 p.m. Tuesday evening due to its security procedures.

It's unclear at this time what may have caused the bomb-sniffing K-9s to react, and the situation is still under investigation.