A live broadcast late Thursday of the sixth U.S. Democratic presidential debate went black in Beijing as candidates were asked about China’s human rights record in the country’s west, according to CNN.

CNN correspondent Will Ripley posted a photo on Twitter of his TV screen, saying his feed cut out.

“CNN live feed of Democratic presidential debate goes to black in Beijing. Candidates were asked about China’s human rights record & the mass detention of Muslim minorities in Xinjiang,” Ripley wrote.

When the candidates were asked about more aggressive action against Beijing, the Democrats mostly condemned the Chinese government

Read more: China cuts live broadcast of US Democratic debate