South Koreans held a demonstration in the capital, Seoul, on Saturday in protest against the tragic stabbing to death of a woman at a public toilet.

The demonstration in downtown Seoul began around the Gangnam subway station. It followed three straight days of memorial events and gatherings in honor of the victim, who was attacked by a stranger on May 17 in Gangnam District.

Many women in Seoul, a city considered to be relatively safe, have expressed both grief over the tragedy and fears about potentially becoming random targets of violence.

The gate of Gangnam subway station has been covered by seemingly thousands of post-it messages expressing sorrow.

“I feel devastated about this incident because it could have been me,” read a note attached to the subway gate.

"I want to live in a place where I don't have to be told I must be careful because I am a woman," read another note.

Post-it walls have appeared in other major South Korean cities as well, including Busan and Daejeon.

Police on Friday arrested a jobless man with a history of mental disorder in connection with the stabbing. The suspect confessed to the police he had attacked the woman because she had been rude to him.

Police said the man had waited about 40 minutes for a woman to appear at the bathroom before stabbing the victim at about 1:00 a.m. local time with a knife he had brought.

Statistics show that violent crimes against women are rising in South Korea. The latest statistics from the Supreme Prosecutors' Office show that in 2014, women accounted for about 85 percent of the country's 34,000 victims of "heinous" violent crimes, including murder, robbery and sex crimes.

Some experts see women as becoming more vulnerable to violence in everyday life, often due to economic factors.

Men who fear losing their jobs and being marginalized vent their frustration on women who compete against them for jobs.