FBI puzzled; wonder what's going on. Nothing to do with Islam

MAN STABS 8 AT MINNESOTA MALL...

'SOLDIER OF THE ISLAMIC STATE'...

'Allah' before rampage...

Asks victims if Muslim...

Just dripping with blood...

Triple strike puts Manhattan on alert for UN summit...
'Bigger than ever' police presence...
Mysterious incidents raise alarms... 
Flip-phone detonators...
Letter With Arabic Writing Found...
PAPER: Call the Bombing Terrorism Already...
Surveillance Footage Shows Man Dragging Bag Between Locations...
5 IN CUSTODY WITH CONNECTION TO NYC EXPLOSION... DEVELOPING...
FEARS OF ACTIVE TERRORIST CELL...