FILE PHOTO - A view of the Rio Bravo, natural border between the United States and Mexico, is seen from behind a fence at the McAllen-Hidalgo international bridge in Reynosa, Mexico January 11, 2019. Picture taken January 11, 2019. REUTERS/Tomas Bravo - RC19B3232150

MEXICO CITY (Reuters) - At least 15 migrants from several countries tested positive for coronavirus at a northern Mexico shelter, Tamaulipas state authorities said on Monday, adding that a man carrying the virus and deported from Houston had infected most of the others.

A Mexican man deported at the McAllen-Reynosa border has also tested positive, the Tamaulipas state health department said in a statement.

In recent weeks, concerns have mounted about the spread of the highly contagious virus through deportation proceedings.

Guatemala President Alejandro Giammattei said on Sunday a total of 50 migrants deported by the United States to the Central American country had tested positive for coronavirus.

The 15 migrants who have tested positive for coronavirus have been placed in isolation, health officials in Tamaulipas said, adding that they would continue testing the rest of the migrants in the shelter in the border city of Nuevo Laredo, where crime is rampant.