CHICAGO - Five people are suing over a fire last month at a Navy Pier restaurant that left four with burn injuries — one of them critically.

What we know:

Cavanagh Sorich Law Group said the incident took place at a private corporate event hosted by investment firm Nuveen at Offshore Rooftop, a popular lakefront restaurant, on Sept. 24.

According to the complaints, the fire started at a food station where guests were roasting marshmallows for s’mores. The suits allege a restaurant employee poured a combustible accelerant, possibly alcohol, onto the open flame, sparking a "fireball" that set guests on fire.

One of the victims, 25-year-old Kira Bond, suffered critical injuries and remains under treatment after surgeries and skin grafts at Stroger Hospital’s burn unit. Another guest, 44-

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