Homeland Security Secretary Kristi Noem says that the US has not seen any new threats from Iran as the country fires rockets toward American military bases in the Middle East in retaliation for US President Donald Trump’s decision to strike its nuclear sites over the weekend, CNN reports.

“We have not seen any currently,” Noem told reporters during an event in West Virginia.

Asked more generally about potential so-called sleeper cells being in the US, the secretary said there have been consistent concerns over the issue since she took over at the department, but nothing concrete.

“We have incredible threats to this country from many nations that are enemies to the United States of America. You know, it’s not just Iran. It’s North Korea, Russia, China,” she said. “My job is to do all I can to protect our country before something bad does happen.

“We have to watch for all of it, and to be diligent on all of it, and we’ll continue to do so,” Noem added.