A bipartisan group of U.S. senators on Tuesday urged the Biden administration to add more sanctions on the military junta in Myanmar, including choking revenues to a state energy company, in response to its coup and violent crackdown on protesters, AP reported.

Senators Jeff Merkley, a Democrat, and Marco Rubio, a Republican, and four others urged Secretary of State Antony Blinken and Treasury Secretary Janet Yellen in a letter to “explore new avenues to support the people of Burma in their ongoing struggle for democracy in the face of escalating crimes against humanity.”

They want the Biden administration to stop royalties flowing from businesses including U.S. energy major Chevron to Myanmar Oil and Gas Enterprise that provides financial support to military leaders, including General Min Aung Hlaing, already under U.S. sanctions.