RICHMOND, Va. - Richmond Police arrested two women Monday evening after a third woman was stabbed on a GRTC bus in downtown Richmond.

The two sisters, Shamia Cox, 20, and Jonae Cox, 21, were charged with malicious wounding.

The victim, described as a woman in her 20's, suffered non-life threatening injuries, police said. She was taken to the hospital for observation and treatment.

The stabbing happened after the victim and the two women got into an argument on the bus. Police said the women all knew each other.

Investigators are talking to witnesses, the bus driver and reviewing GRTC surveillance video.

The incident happened near the intersection of Broad and Bowe Streets.

Pastor Larry Miles says he was sitting in Starbucks and could see the two women on the sidewalk yelling at the third woman who was on the GRTC bus. Miles says he witnessed one of the women hiding a knife behind her back.

He says when the two women made their way back onto the bus he knew things were about to get violent and he raced out to the bus to try and prevent the attack.

Miles says he wasn't fast enough. When he got onto the bus he says he saw the victim being stabbed.

He says when the two women left the bus he followed them on foot and remained on the telephone line with police, giving a description of the women until they were caught by police about six blocks away.