LUSAIL,  (Qatar) 10 December(AP) — Grant Wahl, one of the most well-known soccer writers in the United States, died early Saturday while covering the World Cup match between Argentina and the Netherlands. He was 48.

U.S. media seated near him said Wahl fell back in his seat in a section of Lusail Iconic Stadium reserved for journalists during extra time of the game, and reporters adjacent to him called for assistance. Emergency services workers responded very quickly, the reporters said, and the reporters later were told that Wahl had died.

“He received immediate emergency medical treatment on site, which continued as he was transferred by ambulance to Hamad General Hospital,” the World Cup organizing committee said in a statement, which did not list a cause of death. “We are in touch with the US Embassy and relevant local authorities to ensure the process of repatriating the body is in accordance with the family’s wishes.”

Wahl tweeted on Wednesday that he had celebrated his birthday that day.