Union Pacific is in talks to merge with Norfolk Southern, according to The Wall Street Journal, in a deal that would shake up the railroad business in America.The Journal cited people familiar with the matter.

Railroad operator Union Pacific is exploring a deal to buy smaller rival Norfolk Southern , the Wall Street Journal reported, in a merger that would bolster the industry leader's heft and likely draw intense regulatory scrutiny.

Union Pacific Corp. is exploring an acquisition of Norfolk Southern Corp., setting up what could rank as the largest railroad deal ever, according to people familiar with the matter.The talks are at an early stage and there’s no guarantee the companies will reach a deal,