U.S. Secretary of State John Kerry won't say sorry for America's atomic bombing of Hiroshima when he visits a revered memorial.

A U.S. official traveling with Kerry is ruling out an apology ahead of Monday's tour with other foreign ministers of the Peace Memorial Park and Museum.

It was in Hiroshima where 140,000 Japanese died from the first of two atomic bombs dropped by the United States in the closing days of World War II more than 70 years ago.

Kerry's expected to lay flowers and express the sorrow that all feel upon reflection about the first use of a nuclear weapon against an enemy in history.

The official previewed Kerry's plans on condition of anonymity because the official was not authorized to publicly discuss them before the event.