Agriculture Secretary Brooke Rollins announced the immediate suspension of all cattle, horse, and bison imports coming from Mexico amid the “rapid” spread of a deadly parasitic insect known as the New World screwworm fly.

U.S. Agriculture Secretary Brooke Rollins on Sunday said she is suspending imports of live cattle, horse and bison through the southern U.S. border over the damaging pest New World screwworm, following up on a threat she issued last month to her Mexican counterpart.