CLEVELAND -- A stabbing on an RTA trolley was caught on tape.

The video is violent and graphic, but police want people to see it because they need to find the attacker before he strikes again.

The stabbing happened Monday morning.

Video: Stabbing On Trolley

The attacker is on the run and police want to catch him soon.

The attacker was wearing a white shirt and sunglasses at the time of the attack.

WEWS reported that laughter is heard on the tape, but the attacker appears to become agitated and starts to lean and point his finger at the man sitting across from him.

Then the two begin to argue.

The attacker then gets up and digs into his pocket for a knife. As the man walks to the front of the bus, the attacker says, "Are you sure you want to ruin your day." That’s when the man is stabbed.

The victim, who has been identified as Raymond Mills, tried to fight back but is tackled and appears to be stabbed again.

The bus driver and passengers leave the bus and the struggle continues until the attacker walks off the bus.

After the attack, Mills stumbled off the bus for help. He has since been treated ant released from the hospital.

Cleveland police want to get the attacker off the streets. If you have any information about who he is, call police.