NEW YORK - The New York Police Department says it is looking for a 28-year-old man for questioning in the New York City bombing.

The NYPD tweeted Monday morning that authorities were seeking Ahmad Khan Rahami. He is a naturalized citizen from Afghanistan. His last known address is located in Elizabeth, New Jersey.

Authorities converged on the apartment early Monday after one of five devices found at the nearby Elizabeth train station exploded while a bomb squad robot attempted to disarm it.

Bill de Blasio says he could be armed and dangerous.

An explosion in Manhattan on Saturday injured 29 people. 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. No one was injured. It's unknown if the incidents in New Jersey are linked to the bombing in Chelsea.

Anyone with information is asked to contact FBI at: 1-800-CALL-FBI.