Celebrities from Highland Park, including Rachel Brosnahan, Richard Marx and Ken Olin, mourn the tragedy that unfolded in suburban Chicago on Monday after a shooting disrupted an Independence Day parade, killing six and at least 26 wounded.

The ‘The Marvelous Mrs. Maisel’ star, who grew up in Highland Park, expressed her grief on Twitter.

“I get a stomach ache every time news like this comes out, but I don’t want to get pitiful when you call family and friends to make sure everyone is okay. . no words,” she wrote.

Music star Richard Marx, also from Highland Park, said he checked on people he knew who still lived in suburban Chicago.

“I grew up in Highland Park. I actively seek to check on the well-being of people I still know there. My heart is still broken by these constant mass shootings no matter where they happen, but today I am even more heartbroken. And even more angry at the absurdity,” he tweeted.

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’30s’ actor Ken Olin, who attended the parade as a young man, said he was heartbroken.

Shots were fired about 10 minutes after the parade began at 10 a.m. local time, and law enforcement is still searching for the suspect.

“Highland Park Police are responding to an active shooter incident that occurred in downtown Highland Park during the 4th of July Parade,” the City of Highland Park wrote in a statement to NBC Chicago. “This is an active incident. All individuals are advised to shelter in place. Law enforcement is searching for the suspect; evidence of a firearm has been found.

In response to the shooting, nearby towns in Illinois, including Northbrook and Evanston, canceled their July 4 festivities.