An undocumented Guatemalan immigrant died while in the custody of U.S. Immigration and Customs Enforcement, the agency said Wednesday.

Manuel Cota Domingo, 34, died in a Phoenix hospital from complications related to diabetes.

The man was taken on an emergency basis to a hospital in Florence, Arizona, after he complained of chest pains and problems breathing.

Doctors there determined that he was in fragile health and on Dec. 22 he was transferred by helicopter to the hospital in Phoenix, where he died the next day.

Cota Domingo had been held in the Eloy Detention Center since he was arrested by the Border Patrol on Dec. 8 while he was trying to enter the country illegally.

ICE said that the migrant never revealed his medical condition to U.S. authorities or medical personnel until he became seriously ill, despite being examined twice by doctors.

The Guatemalan consulate in Arizona reported that relatives of the man were notified of his death.

Since October 2003, more than 125 undocumented immigrants have died while in ICE custody. EFE