Three attacks in three states in 12 hours. It’s been two days now, and yet, we have so few answers – chief among them: What, exactly, were the motives? Authorities say the three attacks don’t appear linked.

New York: An explosive device planted near or in a Dumpster in the Chelsea neighborhood wounded 29 people Saturday night. A few blocks away, an intact pressure cooker was found. Video shows the same man planting the devices, both of which had cellphones as timers. But who is the man? And why are officials not calling this a terror attack? Security’s turned up to 10, not just because of the blast, but also because the U.N. General Assembly begins today.

New Jersey: Earlier Saturday, a pipe bomb-type device – again, with a cell phone as a timer — exploded in a garbage can before a Marine Corps charity run in Seaside Park. (Two others didn’t). Thankfully no one was hurt because registration problems had delayed the race. Then overnight, a backpack containing five improvised explosive devices was found at a train station in Elizabeth.

Minnesota: A man, wearing a security uniform, went on a stabbing spree at a mall in St. Cloud, injuring nine people before an off-duty cop shot him dead. ISIS praised the attacker as a “soldier of the Islamic state” — though there’s no immediate evidence he’d had contact with them.