Lam urged foreign critics to recognize that protests that have become increasingly violent over the months are no longer a peaceful movement for democracy.
According to him, the Hong Kong Constitution allows for intervention by the Chinese military, but he did not specify the circumstances under which it would reach that point.
«I still believe that we can find a solution ourselves. The central government is also of the opinion that Hong Kong should solve its own problems, but if the situation worsens, no option can be ruled out if we want to give Hong Kong another chance, ”he said.
Last week, Lam implemented a colonial crisis law to curb protest in order to ban demonstrations from wearing masks. The ban caused widespread outrage and was followed by another violent protest over the weekend.
The ban came into effect on Saturday and, according to Lam, it is too early to consider its implementation a failure. So far, two people have been charged with violating the ban on masks, who could face up to one year in prison and fines.
Critics fear that crisis law will open the way to even more severe restrictions, such as censorship of the Internet.