KANSAS CITY, Mo. (AP) — Missouri Gas Energy failed to take “prompt and adequate” steps to ensure safety the day of a fatal restaurant explosion in Kansas City, according to a Missouri Public Service Commission staff report released Thursday.

The 120-page report said the utility’s workers waited too long before checking whether gas levels had reached unsafe conditions inside JJ’s restaurant on Feb. 19, 2013. An explosion and fire leveled the building, killing Megan Cramer, 46, a server at JJ’s, injuring more than a dozen other people and damaging nearby buildings.