
Bloodstain is seen at the murder site at a chemical factory in Baoshan District, east China's Shanghai Municipality, June 23, 2013. Police arrested late Saturday a 62-year-old man, surnamed Fan, who murdered six people, including four colleagues, a driver and a barracks guard in Shanghai. Photo: Xinhua

Bloodstain is seen at the murder site at a chemical factory in Baoshan District, east China's Shanghai Municipality, June 23, 2013. Police arrested late Saturday a 62-year-old man, surnamed Fan, who murdered six people, including four colleagues, a driver and a barracks guard in Shanghai. Photo: Xinhua

Bloodstain is seen at the murder site at a chemical factory in Baoshan District, east China's Shanghai Municipality, June 23, 2013. Police arrested late Saturday a 62-year-old man, surnamed Fan, who murdered six people, including four colleagues, a driver and a barracks guard in Shanghai. Photo: Xinhua

The chemical factory where the murder happened is cordoned off in Baoshan District, east China's Shanghai Municipality, June 23, 2013. Police arrested late Saturday a 62-year-old man, surnamed Fan, who murdered six people, including four colleagues, a driver and a barracks guard in Shanghai. Photo: Xinhua

The chemical factory where the murder happened is cordoned off in Baoshan District, east China's Shanghai Municipality, June 23, 2013. Police arrested late Saturday a 62-year-old man, surnamed Fan, who murdered six people, including four colleagues, a driver and a barracks guard in Shanghai. Photo: Xinhua

Bloodstain is seen near a chemical factory where the murder happened in Baoshan District, east China's Shanghai Municipality, June 23, 2013. Police arrested late Saturday a 62-year-old man, surnamed Fan, who murdered six people, including four colleagues, a driver and a barracks guard in Shanghai. Photo: Xinhua

Photo taken on June 23, 2013 shows the murder site at a chemical factory in Baoshan District, east China's Shanghai Municipality. Police arrested late Saturday a 62-year-old man, surnamed Fan, who murdered six people, including four colleagues, a driver and a barracks guard in Shanghai. Photo: Xinhua