Instagram removed a post by right-wing provocateur Milo Yiannopoulos on Thursday after he joked in a caption that the pipe bombs sent to public figures this week should have exploded.

“Just catching up with news of all these pipe bombs,” he wrote of the bombs delivered to liberal leaders, including former President Barack Obama, the Clintons, and former Vice President Joe Biden, over the past two days. “Disgusting and sad (that they didn’t go off, and the daily beast didn’t get one).”