China is "deeply worried" about the conflict in Ukraine "spiralling out of control".

"China is deeply worried about the continuous escalation of the conflict and possibility of the situation spiralling out of control," CNN quotes Qin Gang, Chinese Foreign Minister, while delivering a keynote address at the opening of a security conference.

"We urge relevant countries to immediately stop fueling the fire, blaming China, and hyping up the rhetoric 'today Ukraine, tomorrow Taiwan'," the minister said.

Qin's statement came amid a visit to Moscow by senior diplomat Wang Yi and statements by US officials that Beijing is considering providing lethal military aid to the Kremlin.

On Monday, Wang said China is willing to work with other countries to achieve a ceasefire and lasting peace in Ukraine.

Beijing has repeatedly refused to condemn Russia for its invasion of Ukraine and has refrained from calling it a "war" – instead using the Kremlin's description of a "special military operation." China has consistently laid blame on NATO and the United States for the conflict.

The US ambassador to the United Nations said in Brussels that China would cross a "red line" if the country decided to provide lethal military aid to Russia for its invasion of Ukraine.