Police have arrested a man for allegedly killing his ex-girlfriend in front of her two young children.

Sarin Chan, 25, was found dead in her Plymouth Street apartment on Sunday morning with her children nearby, covered in blood.

Police believe the suspect, Chan's ex-boyfriend, stabbed her to death and then tried to take his own life. He was found in the apartment's bathtub with self inflicted stab wounds.

The suspect is now in critical condition at a hospital, but is expected to survive. His name was not immediately made public.

The victim's two children, ages 4 and 6, were also in the apartment, but were not physically harmed.

On her Facebook page, Chan had recently posted relief that she had broken up with the suspect.

The district attorney's office is calling the incident a terrible case of domestic violence.