Two Massachusetts men visiting Boston area colleges on Halloween night when numerous parties were underway have been arrested and charged with causing an explosion over the weekend at Harvard Medical School's campus,

FBI thwarts ISIS-inspired Halloween terror attack in Detroit suburb. Two Michigan men charged after authorities seize arsenal including AR-15s and 1,600 rounds.

Authorities have identified two men killed in a Halloween night shooting in Clifton that investigators say began during a house party.

The Stanislaus County Sheriff's Office said it is investigating a shooting that left one man dead and two others injured during a Halloween party near Modesto.

Two men were arrested on Halloween in Hanford, CA after a traffic stop led to a drug bust, in which police seized 62 grams of meth and 50 grams of fentanyl, as well as other drug paraphernalia.