WASHINGTON, Dec 18 (Reuters) - The National Highway

Traffic Safety Administration said on Wednesday it will not seek

an immediate recall of air bag inflators in about 50 million

U.S. vehicles assembled by 13 automakers and instead will

conduct further investigation.

The agency said in July it thought the vehicles posed

serious safety risks and was considering requiring a recall. The

issue has been linked to one U.S fatality and seven injuries

following an eight-year government investigation.