The United States is expected to bring in at least 50,000 Afghan migrants into the country in an effort to help those who have been allies to American operations, according to statements given by United States Secretary of Homeland Security Alejandro Mayorkas.

“Our commitment is an enduring one,” Homeland Security Cheif Mayorkas said in a statement on Friday. He added, “This is not just a matter of the next several weeks. We will not rest until we have accomplished the ultimate goal”, according to reports from Associated Press.

Even though there is not enough clarity on the exact number of refugees the United States is willing to take in, multiple media reports suggest that tens of thousands of Afghans have already cleared the vetting process of the country and have stepped into the resettlement phase.

Multiple officials from the administration of United States President Joe Biden have been engaged in scrutinizing the process of admitting Afghan refugees in the country as the evacuation from war-torn Afghanistan ended earlier this week.

Mayorkas said there have been some evacuees who have been stopped at transit countries because of “derogatory information,” though he provided no details.

Nearly 130,000 were airlifted out of Afghanistan in one of the largest mass evacuations in US history. Many of those people are still in transit, undergoing security vetting and screening in other countries, including Germany, Spain, Kuwait and Qatar.

More than 40,000 have arrived in the U.S. so far. Mayorkas said about 20% are either U.S. citizens or permanent residents. The rest are people who have received or are in the process of receiving what’s known as a Special Immigrant Visa — for those who worked for the American military or NATO as interpreters 

Others, however, are in the pipeline for acquiring Special Immigrant Visas. This special documentation from the United States government has reportedly been reserved for those who had helped the country during the war that lasted nearly two decades, according to reports from Associated Press.