South Sudan has accepted eight third-country deportees from the U.S. and Rwanda says it’s in talk with the administration of President Donald Trump on a similar deal.

More than 1,000 international students at 128 colleges and universities have had their visas revoked or their legal status terminated since mid-March.

A crackdown on foreign students is alarming college leaders, who say the Trump administration is using new tactics and vague justifications to push some students out of the country.