Neighbors reported hearing an explosion in Montgomery County early Tuesday morning.
Deputies said there was a fire at a home on Mandy Lane near Rogers Road in Willis, Texas.
Montgomery County dispatch workers told KTRH TV partner KPRC Local 2 they had several reports of an explosion at the same location.
Video sent in from Local 2 viewers shows a massive fire. There is little evidence a home was there.
Lifeflight dispatchers said as many as three injured patients were transported by medical helicopter to Memorial Hermann Hospital for treatment.
They said at least one patient was in critical condition.
Photo by KTRH TV partner KPRC Local 2.
Neighbors said they awoke to a loud boom sound.
Brad Trentham lives about five miles away.