Supply concern holds price of oil above US$133 a barrel (Oil-Prices)

VIENNA, Austria _ Oil held steady above US$133 a barrel Tuesday on worries about global petroleum supplies and the outlook for the U.S. dollar.Reports of an attack by militants on an oil pipeline in Nigeria, one of Africa`s largest oil exporters, also supposed prices.Light, sweet crude for July delivery was up 98 cents from Friday at $133.17 a barrel in electronic trade on the New York Mercantile Exchange by noon in Europe.Nymex floor trading was closed Monday for Memorial Day in the U.S., and e