NYC school bus attack
Twitter/Sebastian Sobczak
NYC school bus attack
Now playing
01:10
Video shows kids trapped in bus after attack
The Home Depot truck used in the bike path attack is removed from the crime scene, Wednesday, Nov. 1, 2017, in New York. (AP Photo/Mark Lennihan)
Mark Lennihan/AP
The Home Depot truck used in the bike path attack is removed from the crime scene, Wednesday, Nov. 1, 2017, in New York. (AP Photo/Mark Lennihan)
Now playing
02:04
NYPD: Attack suspect followed ISIS playbook
Now playing
00:48
Victims in New York attack identified
A New York Police Department officer stands next to a body covered under a white sheet near a mangled bike along a bike path Tuesday Oct. 31, 2017, in New York. (AP Photo/Bebeto Matthews)
Bebeto Matthews/AP
A New York Police Department officer stands next to a body covered under a white sheet near a mangled bike along a bike path Tuesday Oct. 31, 2017, in New York. (AP Photo/Bebeto Matthews)
Now playing
01:14
Video shows horror of New York attack
Tawhid Kabir Xisan/Snapchat
Now playing
00:30
Video appears to show suspect after truck attack
CNN
Now playing
01:49
Cuomo: Terror suspect radicalized domestically
NEW YORK, NY - OCTOBER 31: NYPD officers respond after reports of multiple people hit by a truck after it plowed through a bike path in lower Manhattan on October 31, 2017 in New York City. According to reports up to six people may have been killed. (Photo by Kena Betancur/Getty Images)
Kena Betancur/Getty Images
NEW YORK, NY - OCTOBER 31: NYPD officers respond after reports of multiple people hit by a truck after it plowed through a bike path in lower Manhattan on October 31, 2017 in New York City. According to reports up to six people may have been killed. (Photo by Kena Betancur/Getty Images)
Now playing
01:09
New York witness: Bodies had tire tracks
Sruli/Twitter
Now playing
00:40
Video shows bike path after NYC truck incident
Now playing
00:57
NYPD commissioner: This is not about Islam
Now playing
01:03
Gov. Cuomo: Our spirit is stronger than theirs
Now playing
01:16
NYC mayor on attack: Cowardly act of terror
Reuters
Now playing
01:34
NYC residents resilient after truck attack
Investigators inspect a truck following a shooting incident in New York on October 31, 2017. 
Several people were killed and numerous others injured in New York on Tuesday when a suspect plowed a vehicle into a bike and pedestrian path in Lower Manhattan, and struck another vehicle on Halloween, police said. A suspect exited the vehicle holding up fake guns, before being shot by police and taken into custody, officers said. The motive was not immediately apparent.

 / AFP PHOTO / Don EMMERT        (Photo credit should read DON EMMERT/AFP/Getty Images)
DON EMMERT/AFP/Getty Images
Investigators inspect a truck following a shooting incident in New York on October 31, 2017. Several people were killed and numerous others injured in New York on Tuesday when a suspect plowed a vehicle into a bike and pedestrian path in Lower Manhattan, and struck another vehicle on Halloween, police said. A suspect exited the vehicle holding up fake guns, before being shot by police and taken into custody, officers said. The motive was not immediately apparent. / AFP PHOTO / Don EMMERT (Photo credit should read DON EMMERT/AFP/Getty Images)
Now playing
02:06
Vehicles as weapons: A disturbing trend
NEW YORK, NY - OCTOBER 31: NYPD officers respond after reports of multiple people hit by a truck after it plowed through a bike path in lower Manhattan on October 31, 2017 in New York City. According to reports up to six people may have been killed. (Photo by Kena Betancur/Getty Images)
Kena Betancur/Getty Images
NEW YORK, NY - OCTOBER 31: NYPD officers respond after reports of multiple people hit by a truck after it plowed through a bike path in lower Manhattan on October 31, 2017 in New York City. According to reports up to six people may have been killed. (Photo by Kena Betancur/Getty Images)
Now playing
00:35
Witnesses: Driver yelled 'Allahu Akbar'
WPIX
Now playing
01:35
NYPD: Truck drove wrong way on bike path

Story highlights

Sebastian Sobczak captures scene of crash after terror attack suspect hit school bus

"The horror of hearing that bus driver and those screaming kids will haunt me," he says

(CNN) —  

Sebastian Sobczak was walking down the street near the World Trade Center when he heard yelling and saw a mangled yellow school bus. With camera in hand, he went to take stock of what was happening and spotted several children inside the bus.

“They’re stuck in there!” the bus driver yelled.

“Oh my God!” Sobczak said. “Can you call 911? Oh my God!”

Video that Sobczak provided to CNN shows the hectic moments after a man drove a rented truck into cyclists and pedestrians Tuesday on a bike path in Lower Manhattan, killing eight people in the deadliest terrorist attack in New York since 9/11.

Sayfullo Saipov, the suspect in the attack, then slammed into the school bus, authorities said. The collision stopped the suspect, and he exited the truck brandishing imitation weapons before police shot him and took him into custody.

The suspect’s white truck can be seen in the background of Sobczak’s video, but the focus is on students stuck in the caved-in bus. Two students can be seen through a window, and another appears lodged underneath a hunk of mangled metal.

Police quickly arrived on the scene, and later in the video footage, first responders work to rescue a trapped child.

The crash injured two children and two adults, New York Police Commissioner James P. O’Neill said Tuesday.

And Sobczak said he’s unlikely to forget what he saw.

“The horror of hearing that bus driver and those screaming kids will haunt me,” he said.