Local health authorities in southern China's city of Shenzhen declared on Tuesday that a Chinese returnee from Nigeria has tested negative of the Ebola virus.

After spending 72 hours under observation while in isolation at the Shenzhen No. 3 People's Hospital, medical personnel from the hospital have confirmed that the Chinese man is not infected with the dreaded Ebola virus.

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The man had worked in a construction company in the Nigerian business center of Lagos and had returned home to Shenzhen on August 22 when he complained about having fever.

He was immediately sent to the hospital and was declared as "an observation case of Ebola," the Xinhua news agency reported on Wednesday.

Meanwhile, another Ebola observation case in China's capital has also been declared negative of the virus as the middle-aged Chinese man went through thorough examination at the Beijing Ditan Hospital, an affiliate of Capital Medical University that specializes in the detection of the virus.

He displayed symptoms of the feared virus such as fever, vomiting and nausea when he arrived in Beijing after returning from Libya on Sunday.

Following his arrival, he went to the hospital for a checkup first thing on Monday and was dubbed as an observation case for Ebola virus and was released from isolation on Tuesday after tests came up negative.

The virus that is gradually taking over West Africa has become one of China's greatest fears as the Beijing Health Bureau strengthened supervision of people coming from the distraught region to make sure the virus do not reach China.

Patients who suffer from fever at above 37.3 degrees Celsius are required to remain in medical care facilities for comprehensive tests while suspected Ebola patients are immediately transferred to an Ebola treatment designated hospital for further examination.

The Ebola virus has already claimed nearly 1,500 lives over the past six months in affected countries in West Africa as the number of infected still continue to rise worldwide.

Tagsoutbreak, West Africa