NYPD shooting: #NYPDLivesMatter echoes #BlackLivesMatter

After a gunman killed two New York City police officers in Brooklyn on Saturday, people on Twitter used the hashtag #NYPDLivesMatter to express their outrage, echoing #BlackLivesMatter, which had been used to condemn the police killings of unarmed black men Michael Brown in Ferguson, Mo., and Eric Garner in New York.

The suspect in the New York Police Department shooting, Ismaaiyl Brinsley, 28, apparently posted threats on social media that showed a desire for revenge in the Brown and Garner deaths. The officers, Wenjian Liu and Rafael Ramos, were "quite simply, assassinated," New York City Police Commissioner William Bratton said.

The #NYPDLivesMatter conversation captured sentiments ranging from support for the NYPD to criticism of New York Mayor Bill de Blasio to accusations of hypocrisy among "protesters" and "liberals."

In the past day, there have been nearly 90,000 tweets using the hashtag, according to Twitter analytics tool Topsy.

Some used the hashtag to support the NYPD:

Others used the hashtag to show support for the slain officers, but didn't miss the opportunity to point out that #AllLivesMatter:

Many used the hashtag to blast de Blasio:

And a share of the tweets charged "liberals" and "protesters" with hypocrisy.

Contributing: Yamiche Alcindor, John Bacon, Gregg Zoroya and Trevor Hughes