ELIZABETH - Federal agents on Friday remained staged near the Elizabeth family business and home of suspected Manhattan and New Jersey bomber Ahmad Khan Rahami.

A brief glimpse was caught of the suspect's father, Mohammad Rahami, and family members as they left their apartment above the First American Fried Chicken establishment on Elmora Avenue Friday morning, although they did not speak.

Mohammad Rahami, however, has spoken with the New York Times, saying he warned the FBI two years ago about his son, fearing he had been radicalized after trips to Afghanistan and Pakistan.

He went on to compare his son's intake of videos and other material from terror groups such as al-Qaida and the Taliban as "a disease."

In response, the FBI says that the elder Rahami never offered such specifics about his son.

Also on Friday, surveillance video was released in which authorities say Ahmad Rahami could be seen placing a pressure cooker bomb on 27th Street in Manhattan.

The bombing suspect's wife returned to the U.S. from the Middle East earlier this week and is being questioned by federal authorities.

Investigators are moving forward to figure out what modes of transportation Rahami may have taken to deliver the bombs and where he may have learned the techniques used to make them.

A law enforcement official tells News 12 New Jersey that Rahami remains hospitalized and unconscious while being treated for seven gunshot wounds.