Old grenade found in Columbia River bed

Grant PUD security personnel found an old pineapple-style hand grenade below the high water mark of the drawn-down Columbia River near the Old Vantage boat launch in Grant County about 6 p.m. yesterday.

The WSP bomb squad responded and detonated the grenade. Local residents in Sunland Estates and Vantage may have heard the explosion.

The grenade was a fragmentation style device of a style developed for use during World War II. The style was used by U.S. armed forces until the late-1960s.

The grenade was rusty and had apparently been in the river a long time. We don't know how long, nor do we know who put it there.

No one was hurt.