Tencent, China's biggest Internet company, won its third lawsuit against Qihoo 360, a leading Chinese antivirus software developer, over claims of the latter's unfair competition, according to a court ruling issued on April 25.

Qihoo 360 was accused of breaching faith as well as equal competition and was malicious in its competition against Tencent, a Guangdong Provincial High People's Court ruling said.

Qihoo 360 seriously disturbed the Internet business order and set down the roots of a long and drawn-out legal war between the two companies, it added.

Fined 5 million yuan ($802,568) in compensation to Tencent, Qihoo 360 was asked to apologize on its official website and via several major portal websites and newspapers.

Qihoo 360 held a news briefing in Beijing immediately after the trial, saying it will appeal to the Supreme People's Court.