Canadian Maurice Strong agreed to step aside Wednesday as a special envoy for the United Nations, but vowed to clear his name after being linked to Tongsun Park, a Korean lobbyist charged in connection with the Iraq oil-for-food scandal.

At the same time, new details emerged about a Calgary oil company in which Mr. Strong and his son, Fred, were major investors during the 1990s together with Mr. Park -- whom the younger Mr. Strong described as "a spooky guy..."