A suspicious loud noise or explosion was heard about 10:30 p.m. Saturday by residents in Alice, but law enforcement officials weren't able to pinpoint the source.
Some reports said it came from the southside area and others said it was near the Alice airport. But sources so far have not located anything.
Acting Police Chief Albert Martinez said the department received about 15 calls that night about the boom, but were unable to locate anything. He added that a sonic boom was a strong possibility.