An Oregon man has been charged with attempted murder after he allegedly set another man on fire at a Dennys restaurant in the city of Happy Valley.

According to the Clackamas County Sheriffs Office, Deshaun James Swanger walked into the restaurant Wednesday night and sat down in a booth.

The 24-year-old suspect then allegedly poured gasoline on a man sitting in a booth near him, then lit matches that he threw at the victim, according to KGW.

Officials said unreleased surveillance video shows Swanger running out of the restaurant after a large flash near the victim, who was later identified as 69-year-old Scott Ranstrom. Authorities say Swanger and Ranstrom did not know each other.

The victim was taken to a nearby hospital where he is being treated for critical injuries, according to his sister, Leslie Kurtz.

I went to see him and I thought, It wouldnt be that bad, could it? No, its worse, she told KOIN TV. Hes in critical condition its horrible. Whoever did this is horrible.

A GoFundMe account has been set up to help pay for Ranstroms medical bills.

Dennys released this statement about the incident:

We are deeply disturbed by the senseless, random act of violence that took place at our franchised-owned Happy Valley restaurant, and our thoughts and prayers are with our guest that was seriously injured.

Sheriffs Office spokesman Brian Jensen told The Oregonian that the attack appears to have been random and not a hate crime.

However, detectives are investigating whether there is a connection between the Dennys attack and a similar one that happened Sunday night at a local movie theater during a showing of The Fate of the Furious.