HUFFMAN, Texas -

Residents in Huffman are on alert after a loud boom rattled windows.

The Huffman Volunteer Fire Department said they responded to reports early Sunday morning of the noise. The search was called off after investigators found no visible evidence of an explosion.

The Houston Police Department assisted the volunteer firefighters in their search, but they were also unable to find the source of the loud noise.

Investigators have not said what could have possibly been the source of the noise.