A prominent Cambodian opposition lawmaker has fled the country after being warned by government officials that she faced arrest for links with the party president's alleged plot to overthrow the government.

Mu Sochua, who also served as deputy president of the Cambodia National Rescue Party, left Cambodia on Tuesday, a day after Prime Minister Hun Sen warned of strong action against any others who may have been involved in the alleged plot. Kem Monovithya, a deputy party chief for public affairs, said on Twitter late Tuesday that Mu Sochua had received an arrest warning from a senior Ministry of Interior official.

Opposition party president Kem Sokha was charged with treason for allegedly conspiring with the United States to topple the government.