A spokesperson for Purina said the building was being evacuated, and students and staff at Bunche Middle School were seen leaving the building.

Evacuations were called Monday morning as crews work to fix a major gas leak downtown. According to St. Louis Fire Department, there was a underground gas leak near the intersection of South 7th Street and Chouteau Avenue.

Two Purina buildings and the Madison School have been evacuated due to a gas leak near downtown St. Louis Monday morning.