The former Queens resident at the center of an FBI terror investigation here in the city and in Denver missed a fourth day of questioning in Colorado.
Instead of meeting with the FBI, Najibullah Zazi, seen above, spoke with his lawyer.
Law enforcement officials tell ABC News that a computer belonging to Zazi showed that he had researched baseball and football stadiums along with some sites being used for Fashion Week in New York City.
ABC also reported text messages were sent indicating the plot was nearing the attack phase.
An official tells The Associated Press that the FBI had put Zazi under surveillance in connection with a suspected plot to make homemade bombs.
Meanwhile, Zazi's defense team denied reports of a plea deal and dismissed reports that indicated Zazi is directly linked with al-Qaida.
Authorities say Zazi rented a car and drove from Denver to New York, arriving in the city on September 10.
Naiz Khan, a Queens resident and a childhood friend of Zazi, said Saturday that agents questioned him after the suspect visited him from Denver last week. He also said he didn't know of any connections between his friend Zazi and al-Qaida.
Khan's home was raided Monday by federal investigators.
Zazi claimed he made the trip to New York to resolve some issues with a coffee cart he owns in Manhattan, but officials suspected that something more sinister might have been in the works.
Federal officials urged local police Tuesday to keep an eye out for materials that could be used to make homemade explosives. In a warning obtained by the AP, the FBI and Department of Homeland Security list indicators that could tip police off, including people with burn marks on their hands, face or arms, foul odors, and large industrial fans or multiple window fans.
As of Saturday, police had not announced any arrests.
One intelligence official called the threat very real, and emphasized its urgency.
Meanwhile, U-Haul is working with the FBI following reports that Afghan men tried to rent a large truck from a location in Queens.
The rental agency says they will supply authorities with whatever information they need from their location on Linden Boulevard in Flushing.
According to the New York Daily News, seven Afghans tried to rent the largest-sized truck on September 9, but were turned down when they did not show a valid credit card or identification.
Sources told the Daily News the size of the truck suggests the men may have wanted to fill it with explosives.
The paper said at least three Afghan men have been questioned by FBI and immigration officials, but as of Saturday evening no arrests were made.