LANSING (WWJ/AP) – Authorities in Lansing say a woman was apparently shot in the head by a stray bullet ahead of the city’s Fourth of July fireworks show.

Mayor Virg Bernero issued a statement Thursday calling the Wednesday night shooting of the 34-year-old Lansing woman at a park a “senseless act of violence.”

READ MORE: Pope Offers Solidarity To Gaylord, Michigan, After Tornado

“It is a shock to us all that something like this could happen after we took such extensive precautions to keep everyone safe,” Bernero said in the statement. “We deployed nearly 100 police officers throughout the park and screened every single person who entered, yet an innocent bystander was still gravely injured by the reckless discharge of a firearm.”

When she was found she was apparently having a seizure, and the bullet wound was found by medical officials. Police said the woman remained hospitalized Thursday.

Bernero said investigators don’t believe the shot was fired from within Adado Riverfront Park.

Taking to WWJ Newsradio 95, Lansing Police Captain Darryl Green said the shooting is a mystery because no one,  including the dozens of police officers at the park, saw or heard anything.

READ MORE: Former MDHHS Foster Care Worker Charged With Sexually Assaulting Client

“We thought we did everything to increase security at our celebration,” said Green. “Again, we had a gated area, we checked for weapons, we checked for fireworks … we had 115 officers working, you know, one night.”

“The entire police department’s upset about this and trying to do everything they can do try to figure out what happened and who’s involved,” he said.

Anyone with information, or anyone who may know about anyone shooting a firearm Wednesday night or anyone who was near the victim at the time of the shooting, is asked to call Detective Mark Lewandowsky at 517-483-6859 or Crime Stoppers at 517-483-STOP.

The Bureau of Alcohol, Tobacco and Firearms is assisting Lansing police with the case.

MORE NEWS: Replacement Food Assistance Benefits, Emergency Relief Available To Residents Affected By Gaylord-Area Tornado

(TM and © Copyright 2012 CBS Radio Inc. and its relevant subsidiaries. CBS RADIO and EYE Logo TM and Copyright 2012 CBS Broadcasting Inc. Used under license. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. The Associated Press contributed to this report.)