According to the NY Daily News, two NYPD officers were ambushed in Brooklyn.  One officer was apparently shot in the head.

Two NYPD cops were shot when a suspect ambushed them as they sat in a patrol car in Brooklyn on Saturday afternoon, police sources and witnesses said.

The shooting took place outside of the Tompkins Houses, near Myrtle Ave. and Tompkins Ave. in Bedford-Stuyvesant, about 3 p.m., cop sources said.

“The perp came out of the houses, walked up behind the car and lit them up,” a high-ranking police official told the Daily News.

At least four witnesses who saw the shooting provided an identical account to a Daily News reporter, but declined to provide their names.

Both officers were rushed to Woodhull Hospital. Their conditions were not immediately clear.

[Two NYPD cops sitting in patrol car in Brooklyn are shot by gunman in 'ambush' shooting: sources, by Tina Moore, Dale Eisinger, Rocco Parascandola, Thomas Tracy, and Rich Schapiro, New York Daily News, December 20, 2014]

Just after 4'o clock.  The New York Post reported that the officers had died.

Two uniformed NYPD officers were shot dead — execution style — as they sat in their marked police car on a Bed-Stuy, Brooklyn, street corner.

According to preliminary reports, both officers were working overtime as part of an anti-terrorism drill when they were shot point-blank by a single gunman who approached their car at the corner of Myrtle and Tompkins avenues.

“It’s an execution,” one law enforcement source told The Post of the 3 p.m. shooting.

The gunman just started “pumping bullets” into the patrol car, another source said.

The suspected gunman fled to a nearby subway station at Myrtle and Willoughby avenues, where he was fatally shot. Preliminary reports were unclear on whether he was shot by police or his own hand.

[2 NYPD cops shot dead 'execution style' in Brooklyn, by Larry Celona, Kevin Fasick, and Jamie Schram, New York Post, December 20, 2014]

This is one day after a small pro-NYPD demonstration took place at City Hall, which was predictably counter-protested by "anti-racist" demonstrators and given the usually sneering coverage by Gawker and their ilk.  ["I Can Breathe,": An Evening with the Men of #ThankYouNYPD, by Brendan O'Connor, Gawker, December 21, 2014]