BEIJING-- China called for all parties involved to keep restraint over the alleged cyber attack on the US-based Sony Pictures Entertainment, a Foreign Ministry spokeswoman said Wednesday.

"We hope all parties can keep restraint to properly deal with the issue," Foreign Ministry spokeswoman Hua Chunying said at a regular news briefing, voicing China's opposition to all forms of cyber attack and terrorism.

"Cyber attacks tend to be anonymous and transnational so we must have full, professional and complete facts before making any conclusions," Hua said.

China will only make judgements based on facts and deal with cyber attacks in line with international law and China's own law, she added.