The Trump administration said on Monday that it is resuming the admission of refugees from 11 countries with additional screening that it said will increase security but which refugee groups say will make it harder for Muslims to find safe haven in the United States.

In late October, after a pause in admissions, the administration began accepting new refugees except for those from the 11 countries, citing the need for a 90-day security review. Officials did not name the countries, but they were widely reported to be Egypt, Iran, Iraq, Libya, Mali, North Korea, Somalia, South Sudan, Sudan, Syria and Yemen. Those countries have accounted for more than 40 percent of all refugee admissions in recent years.

Refugees from those countries will now be admitted again, but only after additional screening. “These additional security measures will make it harder for bad actors to exploit our refugee program, and they will ensure we take a more risk-based approach to protecting the homeland,” the secretary of homeland security, Kirstjen Nielsen, said in a statement.

Officials from refugee resettlement agencies said that while they welcomed the resumption of admissions, the announcement reinforced their view that the administration was determined to quash arrivals from Muslim countries by making it harder for them to qualify for approval.