Hong Kong (CNN) Chinese Foreign Minister Wang Yi has accused the "black hand" of Western forces of attempting to use recent mass demonstrations in Hong Kong to "stir up trouble" in the city.

An estimated 2 million people hit the streets of Hong Kong on Sunday to protest against the government and an extradition bill which critics allege could see the city's residents sent to face trial in China's opaque criminal justice system.

It was the third mass demonstration in the semi-autonomous Chinese city in just over a week. In response to the public unrest, the extradition bill has been suspended indefinitely and Hong Kong Chief Executive Carrie Lam has issued an apology.

Speaking at a press conference Wednesday, Wang said Beijing supported the Hong Kong government's decision to suspend the bill, but added that China had to be "on guard."

China's Foreign Minister Wang Yi speaks during a press conference at Diaoyutai State Guesthouse on June 19.

"Some Western forces are using this issue ... They have made trouble in Hong Kong, stirred up opposition and tried to sabotage Hong Kong's stability and damage the implementation of one country, two systems," he said.

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