A collapse is being investigated by the Occupational Safety and Health Administration AmazonA spokesperson for the agency said Monday that the warehouse was located in Edwardsville, Illinois. Six workers were also killed in the tornado that struck the region.

Amazon Delivery Depot, also known as DLI4, was hit by a tornado on Friday. In a Saturday press conference, Governor J.B. Pritzker stated that 6 workers were killed and 1 was in serious condition. The 45 others were rescued safe.

OSHA still has six months for its investigation and to issue citations or propose monetary penalties in the event of violations of safety regulations at work, Scott Allen, a spokesperson for OSHA, stated that. Allen stated that OSHA has compliance officers present at the warehouse from Saturday in order to offer assistance.

Amazon representatives did not immediately reply to my request for comment about the OSHA probe.

Amazon had previously stated that it was monitoring the situation and supporting recovery efforts, as well as assisting in Edwardsville’s relief efforts.

Kelly Nantel, Amazon spokesperson stated that they were deeply sorry to hear about the deaths of members of their Amazon family due to the tornado in Edwardsville. We are thinking and praying for the victims, their families and anyone else who was affected by the tornado.

WATCH: Six Amazon employees dead after tornado hits Illinois warehouse