The U.S. Justice Department has sued to block tech giant HPE from acquiring Juniper Networks, the networking firm, citing antitrust concerns.

The Department of Justice sued Thursday to block the $14 billion Hewlett Packard Enterprise Company acquisition of wireless tech competitor Juniper Networks.

The Justice Department on Thursday sued to block the tie-up, a $14 billion deal that would join the second- and third-largest companies providing wireless networking solutions for large corporate customers.