The United States is expanding its travel bans against Chinese officials who are suspected of being persecuted.

On Monday, the Biden administration expanded existing travel prohibitions against Chinese officials it accuses of persecuting ethnic and religious minorities in the country.

Due to their role in crackdowns on freedom of speech and religion in China and abroad, the State Department has barred individuals targeted from entering to the United States. The government did not specify which officials would be affected by the increased restriction, nor did it provide an estimate of how many people would be affected.

The sanctions are being imposed on Chinese officials who are “believed to be responsible for, or complicit in, policies or actions aimed at repressing religious and spiritual practitioners, members of ethnic minority groups, dissidents, human rights defenders, journalists, labour organisers, civil society organisers, and peaceful protestors in China and beyond,” according to Secretary of State Antony Blinken in a statement.

The measure adds to visa restrictions imposed by the Trump administration in response to China’s treatment of Uyghur Muslims in Xinjiang’s western province, as well as suppression of pro-democracy activists in Hong Kong and Tibet freedom supporters.