The rails sector is on high alert following reports that Union Pacific (UNP) is focused on acquiring Norfolk Southern (NYSE:NSC), which could create the nation's first coast-to-coast rails network if the deal cleared regulatory and White House scrutiny.

Union Pacific is reportedly considering acquiring a rival railroad, sending shares of CSX and Norfolk Southern higher.

CSX Corp. stock is up on reports that Union Pacific is interested in buying the Jacksonville-headquartered railroad company. CSX Corp.’s stock rose to its highest level of the year July 17 after a report that Union Pacific Corp. is seeking to buy one of the two major eastern railroads, CSX or Norfolk Southern Corp.