Five people were stabbed at a workplace in Tallahassee on the morning of Sept. 11.

The suspect is in custody, according to Tallahassee police, who identified him as 41-year-old Antwann Brown.

According to the police, the stabbing took place at a Dyke Industries, Inc. dealership in the city’s industrial district. Dyke Industries supplies doors and hardware for homes and businesses in 15 cities throughout the U.S.

Tallahassee Interim Chief of Police Steven Outlaw said Brown has been employed at Dyke for about 3 and a half months. Brown clocked in on Wednesday morning, but was asked to clock out after “a dispute.” The police were called ten minutes later to respond to the stabbing, which injured five people — one of whom is in critical condition, according to a statement from Tallahassee Memorial HealthCare, which is treating the victims. Two others are in “fair” condition and two are in “good” condition; Tallahassee police said they expect all of the victims will live.

Outlaw said the employees were “heroic” at a Wednesday afternoon press conference. “Several employees armed themselves with whatever they could to try to engage him and actually held him at bay at one point while officers were arriving,” he said

Police could not say what the dispute was about, but confirmed it was unrelated to the anniversary of 9/11. He added that he was at a 9/11 ceremony when he was informed of the stabbing. “You can’t help but wonder on the first blush when you hear that, is this related to the anniversary?” Outlaw said. “All of our responding officers, they’re also very cognizant of what day this is.”

Write to Jasmine Aguilera at jasmine.aguilera@time.com.