The U.S. Department of the Treasury's Office of Foreign Assets Control (OFAC) is announcing that certain individuals have been added to the Specially Designated Nationals and Blocked Persons List. This decision is based on OFAC's judgment that specific legal criteria have been met. As a result, all property and interests in property under U.S. jurisdiction belonging to these individuals are blocked, and U.S. citizens are generally forbidden from engaging in any transactions with them. More details, including the list, can be found on OFAC's website.
Simple Explanation
The government made a list of people who are not allowed to do business with American people or companies because they did something wrong. This means all their stuff in America is now locked away.