Chicago gay activist Christian Santiago was among the 5 people killed on Saturday as a result of a stage collapse at the Indiana State Fair, reported.

An additional 40 people were also injured when the main stage where the Sugarland band was preparing to perform collapsed. Police said a severe gust of wind was to blame.

Santiago's partner Alisha Marie Brennon was among the critically injured in the accident.

The 29-year-old Santiago headed the Lesbian Community Care Project at Chicago's Howard Brown Health Center.

“The sudden and devastating loss of Christina has left the entire community, including her Howard Brown Health Center family, heartbroken,” said Howard Brown President Jamal M. Edwards in a statement.

“She has been a leading and driving force in the expansion of our women's health services division and a powerful advocate for all LGBT women,” Edwards added.

Howard Brown and the gay rights group Amigas Latinas, of which Santiago was a board member, have scheduled a Monday vigil in memory of Santiago to be held at Howard Brown's outdoor garden in downtown Chicago at 5PM.