What We Know About Toronto Van Attack Suspect Alek Minassian

Toronto police have identified a 25-year-old man as the suspect in the van attack on Monday that left at least 10 people dead and 15 others injured.

Alek Minassian — of Richmond Hill in the greater Toronto area — was arrested near the scene of the Toronto attack after a short, intense stand-off with Toronto police on Monday. He appeared in court Tuesday morning and was charged with 10 counts of first-degree murder and 13 counts of attempted murder. He did not enter a plea and will return to court on May 10, the Associated Press reported.

Here’s what to know about the Toronto van attack suspect:

Alek Minassian attended a local college

A LinkedIn profile that appears to belong to Minassian says he attended Senaca College in Toronto from 2011 through 2018. The university did not immediately respond to a request for comment from TIME.

Classmates from high school and college told Canada’s Globe and Mail that Minassian appeared to be socially awkward and had significant knowledge of computers and computer chips. One classmate told the Globe and Mail he did not believe Minassian knew how to drive a car.

“My memory is not perfect, but certainly, it would not be, I don’t think, a misstatement to say that he wasn’t overly social,” Ari Bluff, who went to Thornlea Secondary School with Minassian, told CBC News.

The motive is still under investigation

Police said Monday that the motive for the attack is still unclear, but noted that it “definitely looked deliberate.” Officials also said Minassian was not previously known to police

Toronto Police Chief Mark Saunders said the “city is safe,” but said officials have a long way to go in the investigation.

Witness accounts suggested the driver was not swerving accidentally when driving on sidewalks or in the incorrect lane, Saunders said.

“At this time, we have no reason to suspect that there is any national security element to this attack, but obviously the investigations continue,” Canadian Prime Minister Justin Trudeau said at a press conference Tuesday morning.

Minassian had a tense standoff with police

Videos posted on social media of the brief stand-off between Minassian and police showed the suspect holding what appears to be a cell phone and pointing it to look like a handgun.

In the video, a police officer could be heard shouting, “Get down! Get down!”

The video showed the officer pointing a gun at the suspect and giving him multiple warnings. During the confrontation, the suspect yelled “shoot me in the head.” The officer eventually stepped closer to him until the suspect dropped the object. Officers then arrested him.

Minassian reportedly praised the University of California, Santa Barbara killer

A Facebook profile that appeared to belong to Minassian included a post Monday that praised Elliot Rodger, who killed six people and injured 14 others in the 2014 attack at the University of California, Santa Barbara, CNN reports.

The message read, in part, “All hail the Supreme Gentleman Elliot Rodger!”

Rodger had crashed his car into pedestrians, shot at passersby and stabbed others during the incident.

Vehicles have been used as a weapon in other attacks around the world. A man killed eight people using a pickup truck in New York City last fall. In Nice, France, a man drove a truck into a crowd celebrating Bastille Day in July 2016, killing 86 people.

Police are still seeking witnesses of the attack

As police continue their investigation, they are still seeking witnesses of the attack to provide further information. Witnesses with photos or videos of the incident can upload them here.