A disturbing confession has emerged on Reddit as police hunt for a 24-year-old Canadian man suspected of killing his girlfriend, police said.

Ager Hasan fled to the US hours after he allegedly killed Melinda Vasilije, 22, his girlfriend of one year, in a stabbing attack at her Kitchener, Ontario home on April 28, Global News reported.

Since then, a Reddit post purportedly written by Hasan has surfaced. In it, the user Redasblue101 recalled pushing his girlfriend and grabbing a knife.

The post, which includes photographs of the couple and screenshots of their text exchanges, also read: 'The amount of regret and sadness is beyond words. Everyone else is just reading or talking about it. I lived it, I was there. I did it.'

Police are still trying to verify whether the Reddit post was written by Hasan.

Ager Hasan (pictured) fled to the US hours after he allegedly killed Melinda Vasilije, 22, (left) his girlfriend of one year, in a stabbing attack at her Kitchener, Ontario home on April 28

Since then, a Reddit post purportedly written by Hasan has surfaced. In it, the user Redasblue101 recalled pushing his girlfriend and grabbing a knife

Hasan is wanted for second-degree murder and three counts of breach of recognizance, Insp. Mike Haffner told Global News.

The breaches of recognizance refer to a 'domestic-related incident' on April 3, when Hasan was arrested for two counts of assault during a break-and-enter.

While Vasilije was not a victim in that incident, Hasan was restricted from her town of Kitchener and barred from contacting her, according to the police.

Weeks later, the 22-year-old was found dead around 3am on April 28 after police responded to a 911 call.

She suffered multiple stab wounds, and Hasan became a prime suspect.

But the 24-year-old had fled the country, and was last seen on April 28 stealing a license plate in the parking lot of a Walmart in Erie County, Pennsylvania, to replace the Ontario plate on his black, 2016 Honda.

Hasan was last seen on April 28 stealing a license plate in the parking lot of a Walmart in Erie County, Pennsylvania, to replace the Ontario plate on his black, 2016 Honda (pictured)

According to a Reddit post titled 'Wanted for Kitchener murder my side', the couple had recently broken up and started patching things up again.

When Hasan admitted to seeing other people while they were on a break, the two began fighting, according to the Reddit post.

'She started freaking out. Wouldn't say a word and just kept slapping me with tears in her eyes. Slaps turned into hits. I told her I was sorry but if she didn't stop I'd do something back. She didn't stop. I then stupidly pushed her, harder than I expected. She fell against the sink.'

'Almost out no where she grabs a knife by the sink. Initially I thought [she] was just going to hold it to try and tell me to leave. She doesn't. She comes at me in full force, aiming towards my face,' the Reddit post states.

'I tell her to stop. She doesn't, I tried grabbing the knife but ended up cutting my hands. After a few cuts I lost it. I freaked out, I was scared and in a state of shock.

'Never in a hundred years did I think she would use a knife against me. Out of shock and fear I grab one. I hit her with it, almost blindly. A few times. I didn't know what happened. I was confused, shocked and scared.

When Hasan admitted to seeing other people while they were on a break, the two began fighting, according to the Reddit post. He maintained they were best friends and apologized

The person alleging to be Hasan also disputed the idea that he was running away, writing he needed some time to process what happened before turning himself in. Pictured, a text exchange included in the Reddit post, purported to be last texts between Hasan and Vasilije

'I had no intentions of that happening. When I left I honestly thought she just passed out. Then I looked at the blood, and started freaking out and just ran. I didn’t [know] for sure she had died until the next day. I honestly had no intentions of ever doing that to her, I was protecting myself.

The Reddit user also maintained the two were best friends, apologized to Vasilije's family, and wrote: 'Rest in peace my beautiful. I hope you forgive me in the after life.'

The person alleging to be Hasan also disputed the idea that he was running away, writing he needed some time to process what happened before turning himself in.

Anyone with information should contact Crime Stoppers at 1-800-222-TIPS (8477).