Two employees of a skate shop were killed Saturday when a gunman armed with a shotgun and “a large amount of ammunition” opened fire in the store in a shopping mall in Columbia, Md., near Baltimore, before apparently killing himself, police said. The two victims -- identified by police as Brianna Benlolo, 21, of College Park, Md., and Tyler Johnson, 25, of Mount Airy, Md -- were employees of the skating store, Zumiez. The male shooter, whose body was found nearby the store, had a shotgun and “a large amount of ammunition on and about him,” Howard County, Md., Chief of Police Bill McMahon said. "A search of the shooter's bag found inside the store revealed two crude devices that appeared to be an attempt at making explosives using fireworks. Both were disabled," a police statement read, adding that the mall would be closed Sunday.