When police arrested a 13-year-old boy in Washington state last week accused of making threats to kill, they found he had “everything ready to go to commit a mass shooting” – including a trove of more than 20 guns in his home.

TACOMA, Wash. (AP) — A 13-year-old boy described by police as obsessed with school shooters was arrested on multiple firearms possession charges and causing a threat after they say they found social media posts about intentions to kill and seized 23 guns and ammunition from his home.

A 36-year-old man was arrested Tuesday morning after FBI Boston special agents informed local police that he was making bomb threats via social media, according to police.