Trump announces on Twitter he's delaying announcement of running mate due to truck attack in France

(AP/FOX 11) - Donald Trump says on Twitter that he is delaying the announcement of his running mate following the deadly truck attack in France.

After a day of speculation about who might join Trump atop the Republican Party's presidential ticket, Trump tweets on Thursday night: "In light of the horrible attack in Nice, France, I have postponed tomorrow's news conference concerning my Vice Presidential announcement."

Trump had been scheduled to unveil his pick at an 11 a.m. news conference at a hotel in midtown Manhattan.

Late Thursday, a truck drive onto the sidewalk and plowed through a crowd of revelers who'd been gathered to watch Bastille Day fireworks in Nice, France. Authorities say dozens of people are dead.