Two Saudi students were found dead on Saturday in a garage near their off-campus residence in Rockford, Illinois.
Mohammed Mufti, 24, and Amjad Balkhair, 21, who were first-year Rockford University students, were found along with their car.
Head of the Saudi student club Faisal al-Anzi told Al Arabiya English that investigations are underway.
Mufti was studying biology, while Balkhair was studying computer science.
US authorities said there was no sign of murder, however according to the Rockford fire department, carbon monoxide levels were elevated in the garage.
An autopsy is scheduled for Monday morning and toxicology tests will be available in approximately two weeks.