
Police said Li Hai, 19, killed himself after working at the plant for only 42 days, the official Xinhua News Agency reported. Foxconn did not immediately comment on the death.
The suicide is the ninth at Foxconn's massive plant in the southern city of Shenzhen, which employs more than 300,000 people. Two other workers have tried to kill themselves by jumping from buildings in Shenzhen but they survived. Another suicide occurred at a smaller plant in northern Hebei province in January.
Labor activists say the string of suicides back up their long-standing allegations that workers toil in terrible conditions at Foxconn.
They claim shifts are long, the assembly line moves too fast and managers enforce military-style discipline on the work force.
In Hong Kong on Tuesday, about a dozen labor activists protested at Foxconn offices in the Chinese territory.
They held signs that said, "Foxconn lacks a conscience" and "Suicide is no accident." The protesters from the Hong Kong Confederation of Trade Unions burned cardboard cutouts resembling iPhones.
But Foxconn has insisted that workers are treated well and are protected by social responsibility programs that ensure their welfare. The Shenzhen factory is perennially a popular place to work, with hordes of applicants lining up for jobs during the hiring season.
On Monday, Foxconn Chairman Terry Gou told reporters, "We are certainly not running a sweatshop. We are confident we'll be able to stabilize the situation soon."
Tuesday's reported death came just three days after a 21-year-old man who worked in the logistics department jumped from a four-story building shortly after finishing the night shift Friday. His motivations were still not known.
The highest-profile Foxconn death happened last July when Sun Danyong, 25, jumped to his death after being interrogated over a missing iPhone prototype.
Comment: Here are the following deaths at Foxconn this year before today's suicide (May 25th):
January 8th: 19-year-old, Rong Bo, jumped off the company's dormitory building. His death was "covered up" by the company.
January 23rd: 19-year-old, Ma Xiangqian, died while working a night-shift in Shenzhen Guanlan plant. The reason of death was uncertain immediately, but an autopsy later confirmed it to be from falling off the building.
February 23rd: 16-year-old, Wang Lingyan, was found dead of "natural causes" on her dormitory bed in the Langfang plant. Her death was also "covered up" by the company.
March 11th: a worker in his twenties, named Li, jumped to his death from the fifth floor of the dormitory at Shenzhen Longhua plant.
March 29th: 23-year-old, named Liu, jumped from the 14th floor of a dormitory at the Longhua plant.
May 6th: 24-year-old, Lu Xin, who joined Foxconn in August 2009, jumped from the 6th floor of the VIP hotel in Foxconn's Long Hua site.
May 11th: 24-year-old, Zhu Chenling, died after jumping from an apartment building near the Longhua plant.
May 14th: 21-year-old, named Liang, with "several" knife cuts fell out of the seventh-floor window of one of Foxconn's dormitories in Shenzhen.
May 21st: 21-year-old, Nan Gang, leapt from a four-story building in Foxconn's industrial complex in Longhua Township.