Oleg Tcherniak slashed the officer after knocking an elderly man to the ground, sources said.
The explosive was thrown at a Bensonhurst home early Thursday morning.
The child fell from a third-story window in Borough Park Wednesday evening.
Bilal Ghumman hit Blima Friedman and her pregnant mom with a van he took in Borough Park, sources said.
Kostyantyn Proskurnyak killed his dad Voclodymyr Yeushchenko in their Brighton Beach home, sources said.
A fire broke out in an apartment on 92nd Street Friday morning, the FDNY said.
Cameron Waithe, 54, opened fire after being rejected for an ironworks job in Gowanus, sources said.
The fatal family dispute broke out inside a Marine Avenue home in Bay Ridge, police said.
The child was taken to Lutheran Medical Center with a minor injury to his leg, police said.
About 20 vehicles collided with one another on the icy Gowanus Expressway Tuesday, police said.
Police believe a man was riding on an F train when his head hit a steel beam at the Fourth Ave. station.
Giovanni Rodriguez, 22, was fatally stabbed in Sunset Park Sunday afternoon, cops said.
The MTA is expected to restore the Third Avenue line, which was cut in 2010.
A 12-year-old was hit by a car near a playground and another boy's food was run over by a bus, FDNY said.
All 12 patients were taken to Lutheran Medical Center with minor injuries, FDNY said.
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