Tuesday’s tragic terror attack in Manhattan was well-planned, according to officials. During a Wednesday news conference, John Miller, the NYPD’s deputy commissioner of intelligence and counterterrorism, said Sayfullo Saipov, 29, an Uzbekistan native, followed an ISIS-plotted agenda “almost to a ‘T.’”

Miller said Saipov had been planning his attack for weeks, reviewing the site of his heinous crime prior to driving a rented truck into cyclists and pedestrians who were using a popular Manhattan bike path.

According to the New York Post, Saipov “drove into the city at least twice in a single day less than a week before the attack — and cops are investigating whether he was making a dry run.”

Sayfullo Saipov, 29, used his E-ZPass to drive through the Holland Tunnel twice and his car was seen on the George Washington Bridge once on Oct. 28, according to the sources.

Three days later, Saipov drove into the city on the George Washington Bridge, then plowed into nearly two dozen people in a bike lane on the West Side Highway.

Saipov, who is believed to be in the United States via the Diversity Visa Lottery Program, is accused of killing eight and injuring 12. Investigators have uncovered evidence linking him to ISIS.

Before the deadly assault, ISIS had been encouraging followers to carry out Halloween attacks. Miller said Saipov had been planning the assault for a “number of weeks,” toured the bike path area, and did it “in the name of ISIS.”

Notes left in his vehicle contained a pledge of allegiance to ISIS, Miller said, and included symbols and Arabic words on them, stating: “Islamic State would endure forever.”

According to Miller, Saipov followed instructions released by ISIS, detailing how to carry out a vehicle attack.

After interviewing Saipov, investigators would not reveal the full details of his statements; however, some reports indicate Saipov has bragged about what he did and expressed pride in the attack.

SITE intelligence group, which monitors terror activity online, noted that a recent photo was taken by an ISIS supporter near the scene of Tuesday’s attack, according to Fox News. It is unknown at this time whether there is a connection between the photo and Saipov’s actions.