ST. LOUIS, Mo. - An overnight warehouse fire near downtown had crews working well until the morning to put it out. The St. Louis Fire Department was called out to Second and Lombard around 3:15 Sunday morning. It was deemed a second alarm fire so the St. Louis fire Department had more than 60 firefighters on scene along with five aerial sprayers. It took nearly 4 hours to put out the flames and the hot spots, but they kept a close eye long after for any flair ups. The chief fire inspector is still trying to determine the cause of the fire.