The Trump administration is set to widen its travel restrictions, extending the ban to over 30 countries, according to Homeland Security Secretary Kristi Noem. This decision follows an incident involving an Afghan national accused of shooting two National Guard members.

This latest move builds on a travel ban announced in June by the Republican administration, which prohibited travel to the United States for citizens from 12 countries and imposed limitations on travelers from seven additional nations.

Earlier this week, Noem hinted on social media that the list of affected countries might grow.

During a Thursday night interview with Laura Ingraham on Fox News, Noem refrained from offering specific details, explaining that President Donald Trump was still deliberating on which countries to include in the expanded ban.

In response to the National Guard shooting, the administration has already intensified restrictions on the 19 countries initially subjected to the travel ban. These nations include Afghanistan, Somalia, Iran, and Haiti, among others.

Ingraham asked Noem whether the travel ban was expanding to 32 countries and asked which countries would be added to the 19 announced earlier this year.

“I won’t be specific on the number, but it’s over 30. And the president is continuing to evaluate countries,” Noem said.

“If they don’t have a stable government there, if they don’t have a country that can sustain itself and tell us who those individuals are and help us vet them, why should we allow people from that country to come here to the United States?” Noem said.

The Department of Homeland Security did not respond to requests for comment about when an updated travel ban might go into effect and which countries would be included in it.

Additions to the June travel ban are the latest in what has been a rapidly unfolding series of immigration actions since the shooting Thanksgiving week of two National Guard troops in Washington.

Rahmanullah Lakanwal, who emigrated to the US from Afghanistan after the US withdrawal, has been charged with first-degree murder after one of the two victims, West Virginia National Guard Specialist Sarah Beckstrom, died of wounds sustained in the Nov. 26 shooting.

The second victim, Staff Sgt. Andrew Wolfe, was critically wounded.

Lakanwal has pleaded not guilty.

The Trump administration has argued that more vetting is needed to make sure people entering or already in the US aren’t a threat.

Critics say the administration is traumatizing people who’ve already gone through extensive vetting to get to the US and say the new measures amount to collective punishment.

Over the course of a little more than a week, the administration has halted asylum decisions, paused processing of immigration-related benefits for people in the US from the 19 travel ban countries and halted visas for Afghans who assisted the US war effort.

On Thursday, US Citizenship and Immigration Services announced it was reducing the time period that work permits are valid for certain applicants such as refugees and people with asylum so they have to reapply more often and go through vetting more frequently.