The Grant County sheriff says an explosion at a Moses Lake home has critically injured a 16-year-old boy.

Sheriff Tom Jones said the Wednesday afternoon call was initially described as a pipe bomb explosion. Officers locked down the house and called for the Richland police bomb squad to assess exactly what happened and whether the house contained any more explosives.

The boy was being sent to Harborview Medical Center in Seattle. And a man was treated at the scene for minor injuries.

The sheriff says there were other people in the home at the time. The investigation has been turned over to Moses Lake police after determining that the address is inside city limits.