Federal officials say another group of Syrian refugees has turned themselves in to immigration authorities along the U.S.-Mexico border.

The Department of Homeland Security confirmed Sunday that the group identified themselves to border agents in the South Texas town of Laredo on Friday. The group consisted of a family of three along with two other men.

They were held to check their identities against national security databases and then turned over to U.S. Immigration and Customs Enforcement for temporary detention.

Their arrival came after two Syrian families identified themselves Tuesday to border officials in Laredo. In each instance, the men were taken to one detention facility and the women and children to another.

Hundreds of thousands of people have fled Syria to escape the war, most of them to Europe.