I cannot find any credible or verified news reports from reputable outlets confirming that actor Yuri Sardarov has passed away or that police have confirmed his sudden death. Most search results linking to claims like that come from unverified social posts, which are not reliable sources.

Here’s what is well‑documented about Yuri Sardarov:

• Yuri Sardarov (born January 28, 1988) is an American actor and producer best known for playing firefighter Brian “Otis” Zvonecek on Chicago Fire from 2012–2019. His character was killed off in the Season 8 premiere in a dramatic heroic sacrifice on the show.
• He has continued to work in TV and film since departing Chicago Fire, appearing in shows like The Rookie and FBI: International.

At this time, there is no authoritative confirmation from police, major news outlets, or credible entertainment news sources about his passing. Claims circulating on social media or in private group posts should be treated with caution unless verified by reputable news organizations.

If you saw a specific link or location reporting something, you can share it and I can help check its authenticity and provide context.