Michael Loccisano/Getty Images for HBO

The merger between the telecommunications giants T-Mobile and Sprint is in jeopardy. 

Department of Justice staff recommends the deal, which would form a $146 billion company to take on Verizon and AT&T, be blocked, according to Reuters. Still, the DOJ is up to a month away from making a final ruling, the report said. 

The deal would join the third- and fourth-largest US wireless providers, giving them a combined 127 million customers, was expected to face hurdles from the start as the $85 billion deal between AT&T and Time Warner faced stiff opposition from the Trump administration. It was finally approved after the companies were able to reach an agreement with antitrust regulators.  

This story is developing. Check back for updates.