An explosion in Manhattan on Saturday injured 29 people. New York Gov. Andrew Cuomo had said earlier that it didn't appear to be linked to international terrorism. A pressure cooker device was also found blocks away, but it didn't explode. Authorities were trying to determine if they were connected.
A pipe bomb also exploded Saturday in a New Jersey shore town ahead of a 5K marathon. No one was injured.
And on Sunday night, five explosive devices were found near an Elizabeth, New Jersey, train station.