World oil prices sank Friday after the International Energy Agency warned that US crude inventories were nearing storage capacity amid a global oversupply. US benchmark West Texas Intermediate for April lost $2.21 to close at $44.84 a barrel on the New York Mercantile Exchange. “The petroleum market is coming under renewed selling pressure after a monthly report from the International Energy Agency highlighted rising US inventories, echoing market concerns regarding storage capacity,” said Tim Evans of Citi Futures.