A 33-year-old man killed his girlfriend, stabbed her elderly mother and tried to commit suicide after a domestic row in a house in Bulgaria`s village of Medkovets on Tuesday. The victim, aged 29, has also died of stabbing wounds. Her mother`s life is out of danger, doctors from a local hospital reported. The attacker committed the attempted suicide after he realized his girlfriend is not breathing and stabbed himself at the chest. The man`s conditions remains critical. The reasons for the incident are still under investigation.