SAGINAW, MI -- Less than 40 minutes into Saginaw's Fourth of July fireworks show, the controlled explosions above the Saginaw River were abrubtly cut short.

Saginaw Area Fireworks President Bill Giorgis said a malfunction is to blame for the show's sudden end.

"The top of one of the large guns blew off and took out the main fire control module," Giorgis said. "And that blew all connectivity for the rest of the show."

He said organizers are thankful that no one was injured by the malfunction.

Related: Watch for some surprises in the sky at Saginaw's Fourth of July fireworks

While it is unclear the exact details of the malfunction, Giorgis said one of the large fireworks shells somehow damaged the firing module.

"The computer told them that they had lost connectivity," he said. "One of the big shells, it didn't ground-fire, but it blew the modules."

Giorgis said the malfunction cut off somewhere between the last 15-30 percent of this year's fireworks show.

Other than the malfunction, he said the show had been running seamlessly. A new addition -- a series of fireballs launched skyward from the main firing location and Holland Avenue bridge -- were a big hit with the crowds.

"The timing and the cues were great," Giorgis said. "It seemed to be working really, really well."

The fireworks organizer said he is currently waiting to investigate the scene of the incident with local firefighters and the fire marshal. But Giorgis said attendees need not be concerned about their safety on or off Ojibway Island.

"There is no imminent danger or emergency right now," he said.

Check back for more details on the malfunction as they become available.

Mark Tower covers local government for MLive/The Saginaw News. Contact him at 989-284-4807, by email at mtower@mlive.com or follow him on Twitter, Facebook or Google+.