BEIJING, March 27 (Xinhua) -- A Chinese foreign ministry spokesperson on Friday urged the United States to thoroughly investigate the incident concerning a Chinese postdoctoral researcher, who committed suicide a day after being interrogated by U.S. law enforcement.

File photo of Chinese foreign ministry spokesperson Lin Jian (Photo: mfa.gov.cn)

Spokesperson Lin Jian made the remarks at a daily press briefing, adding China is deeply saddened by the tragic incident and has lodged representation to the U.S. side.