U.S. soccer journalist Grant Wahl died of a ruptured aortic aneurysm while covering the World Cup in Qatar, Wahl’s wife, Dr. Celine Gounder, said in a statement on Wednesday. Grounder said Wahl’s body was returned to the United States on Monday, where an autopsy was performed.

An aortic aneurysm happens when the aorta, the main artery that carries oxygen-rich blood from the heart to the rest of the body, develops a balloon-like bulge. According to the CDC, it can build for years, often with no symptoms or symptoms that can seem like something else (like pain in the back, belly or side). When the pressure on the aorta gets too great, it can rupture.

Wahl, just 48 years old, had not been feeling well in the days leading up to his death. On his podcast, he revealed that he had been to a medical clinic twice, and that he had bronchitis. Wahl died on Friday while in his seat in the stadium press box where he was covering the quarterfinal match between Argentina and the Netherlands. Paramedics arrived almost instantly and tried to revive him, but were unsuccessful.

Some initially suspected Wahl’s death was the result of foul play, as Wahl had been outspoken in his criticism of the Qatari government for their treatment of migrant workers. Wahl’s brother, Eric, initially suspected Grant had been killed, perhaps in connection to his recent act of protest in support of the LGBTQIA+ community. Homosexuality is outlawed in Qatar, but Wahl decided to wear a rainbow shirt to a match on Nov. 21 in support of Eric, who is gay, and the LGBTQIA+ community. Grant Wahl wrote on his Substack that he was detained by security and forced to remove the shirt before being released.

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However, Eric tweeted on Tuesday that he no longer suspected his brother’s death was the result of foul play.

“While the world knew Grant as a great journalist, we knew him as a man who approached the world with openness and love,” Grounder wrote. “Grant was an incredibly empathetic, dedicated, and loving husband, brother, uncle, and son who was our greatest teammate and fan. We will forever cherish the gift of his life.”