(CNN) – On Instagram, #shootthepolice is no longer searchable. On Twitter, a hashtag is still visible that groups posts together inciting violence against cops.
Here’s one post from Twitter: An image of a gun with the message, “Speak to cops in a language they understand.” There are also videos of police altercations with civilians.
The posts show the challenges social media companies face.
Before gunning down two New York cops this weekend, Ismaaiyl Brinsley posted on Instagram: “I’m putting wings on pigs today…they take one of ours, let’s take two of theirs.”