Interior Secretary Ryan Zinke said Thursday morning that his department has not authorized the import of any elephant trophies since the Fish and Wildlife Service announced it will consider these imports from African countries on a case-by-case basis.

“We have not imported one elephant,” Zinke said in testimony about the Interior Department’s budget before the House Natural Resources Committee. His remarks came after conservation and animal rights groups have criticized the Trump administration’s move to allow some imports, saying the new policy will be difficult to monitor.