Two arrested after Twitter posts threat to ‘shoot up a synagogue’

Two men who were arrested at New York’s Penn Station after authorities spotted social media posts about attacking a synagogue represented a real danger to the city’s Jewish community, Mayor Eric Adams said Monday.

This was not an idle threat,” Adams said at a news conference where he was joined by officials from the FBI, the Metropolitan Transportation Authority and other agencies involved in the arrests early Saturday of Christopher Brown, 21, and Matthew Mahrer, 22, on charges including criminal possession of a weapon.

This was a real threat, he said.

According to the criminal complaint against him, Brown made a series of threats on Twitter including, on Thursday,