MOSES LAKE - A loud boom was heard through Moses Lake Saturday night about 8:30 p.m.

Authorities do not know what caused the sound.

People described it in a variety of ways from a methane explosion to a sonic boom.

"I don't know what it was, but it was loud," said Moses Lake police Capt. Dave Ruffin. "It sounded like a transformer blowing (up) down the street."

The Multi Agency Communications Center (MACC) received several reports through 9-1-1 about the sound of an explosion and deputies were dispatched to determine the cause, said Kyle Foreman, Grant County Sheriff's Office public information officer.

"The sound came from the sand dunes, but we couldn't find anything," said Foreman.

Moses Lake firefighters did not receive any calls for fires or explosions, said Chief Tom Taylor.

The US Air Force did not have any jet fighters operating in Grant County this weekend, nor any other types of aircraft operating at supersonic speeds, according to Foreman.

Authorities would like to determine the cause, said Foreman.

If people have information about the source of the boom, they are asked to call 9-1-1.