One driver, who police are calling a terrorist, rammed pedestrians and cyclists in lower Manhattan Tuesday, killing 8 people and injuring about a dozen more.

The FBI says it's investigating the incident as an act of terrorism. Video from the scene shows multiple people injured on a bike path which runs adjacent to NYC's West Side Highway. Police have the suspect in custody after an officer opened fire, shooting him in the abdomen.

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NYPD says the alleged terrorist drove down the bike path for about 20 blocks before running into a school bus. That's when the NYPD officer engaged and shot the suspect.

BREAKING: At least 2 dead &multiple others injured after truck ramming in lower Manhattan pic.twitter.com/9Xi2aciW5h — Buster Hyde USMC/Ret (@BusterUSMC) October 31, 2017 @BusterUSMC

The attack is the deadliest act of terror in NYC since 9/11.

Singer Josh Groban was in a nearby park with his dog, and says he heard 8-10 shots ring out as he fled the area.

Once I got far enough away I took this video of the quick response from our amazing NYPD and NYFD pic.twitter.com/v0nwJiqmDw @joshgroban