NEWARK — Newark Mayor Cory Booker rescued a dog left outside in the freezing cold in front of a Newark home last night, Eyewitness News reports.

The Twitter-savvy mayor learned the dog was left alone from where else? A tweet from an Eyewitness News reporter.

“This is brutal weather out here, this dog is shaking really bad," Booker told Eyewitness News during the rescue. "And you just can’t leave your dogs out on a day like this and go away."

A police cruiser responded to the scene within minutes of the mayor's arrival, at which point Booker took the dog to the car to keep warm.

Booker then found the dog owner's cell phone number, placed a call and the owner returned home, according to the report.

Booker told the Star-Ledger Thursday the city was taking swift action against landlords that didn't provide heat to their tenants.

"We have a really good system of trying to follow up and hold our building owners accountable, and do fast action when it comes to meeting the needs of people without heat," Booker said.

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