Trump delays VP announcement after Nice, France attack

Donald Trump is delaying the unveiling of his running mate due to the deadly truck attack in Nice, France, the GOP candidate announced on Twitter Thursday evening.

Trump had scheduled a news conference for Friday. CBS News has learned that Trump has selected Indiana Gov. Mike Pence to be his vice presidential pick.

In an interview with Fox News Channel's Greta Van Susteren, Trump was asked what he'd do to prevent any further attacks. He told her that he would make it "very, very hard for people to come into our country" from "terrorist areas," and he would begin what he called "extreme vetting."

"I would not allow people to come in from terrorist nations," he said. "I would do extreme vetting. I would call it 'extreme vetting,' too."

Dozens were killed when a truck drove on to the sidewalk and plowed through a crowd of Bastille Day revelers who'd gathered to watch fireworks in the French resort city late Thursday in what some officials and eyewitnesses described as a deliberate attack.

Sylvie Toffin, a press officer with the local prefecture, said that the truck "hit several people on a long trip" down the sidewalk near Nice's Palais de la Mediterranee, a building that fronts the beach. She called the incident "an attack." Nice regional president Eric Ciotti said on France Info radio that "It's a scene of horror" and gave a figure of at least 60 dead. He said he was speaking from the scene.

It was not immediately clear who would have been behind an attack, but France has recently seen a spate of dramatic assaults from by jihadist groups, including the Islamic State of Iraq and Syria (ISIS).

Immediately following the incident, Trump tweeted:

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