Watch: Bill de Blasio Met By Rikers Protesters While Voting In Park Slope

PARK SLOPE, BROOKLYN — Bill de Blasio took a visit to Park Slope on Tuesday morning – and it wasn't (only) to hit the YMCA gym.

The mayor went to the Park Slope Library, on the corner of Sixth Avenue and Ninth Street, to vote in the citywide primary elections in his home district. De Blasio is up for the Democratic nomination for mayor. With little real opposition, he's expected to cruise to victory relatively smoothly.

That doesn't mean his Brooklyn jaunt was totally relaxing, though.

De Blasio was met outside the library by a group of protesters who want the mayor to close the prison complex at Rikers Island. They stood on the other side of police barricades and chanted, "Close Rikers down!" while the mayor walked by.

De Blasio nodded at the group in acknowledgement but didn't speak to protesters.

The mayor announced earlier this year that the city was committed to shutting down the notorious jail, but he admitted it could take more than 10 years to actually accomplish that goal.

A statement from #CLOSErikers, the group protesting Tuesday, said that time frame is too long.

"The Mayor has claimed it will take at least ten years to make closure a reality, a timeline that the #CLOSErikers campaign has criticized as too long," the group said Monday.

"According to the campaign, another ten years of Rikers operating translates to 470,000 people incarcerated at Rikers, with 418,000 of those people being Black and Latino. It will also cost approximately $13 billion to keep the jail complex operational for another ten years."

Image: Associated Press/Mark Lennihan