A top aide to President Joe Biden told representatives from the National Unity Government (NUG) Monday that he is concerned by the military junta's arrest of democracy activist Ko Jimmy, a White House spokeswoman said.

Last Saturday, soldiers raided a housing complex in the North Dagon township of Yangon, arresting Ko Jimmy, who is also known as Kyaw Min Yu.

National Security Advisor Jake Sullivan met virtually with members of the NUG, Duwa Lashi La and Zin Mar Aung, NSC spokeswoman Emily Horne said in a statement.

Sullivan "underscored continued US support for the pro-democracy movement in Burma and they discussed ongoing efforts to restore Burma's path to democracy," Horne said.

Sullivan called out what he called "the Burmese military's brutal violence" and "also expressed concern over the recent arrest of pro-democracy activist Ko Jimmy."

The United States "will continue to advocate for his release and the release of all those unjustly detained," Horne said.