Famed American soccer journalist Grant Wahl died while covering the FIFA World Cup in Qatar. He was 48.

Wahl "fell ill" while covering the Argentina-Netherlands quarterfinal, a spokesperson for the Qatari World Cup planning committee told Fox News. After paramedics performed CPR for several minutes at the scene, he was taken to Hamad General Hospital.

Wahl had been "laughing at a joke we saw on Twitter" just minutes before reportedly collapsing, journalist Rafael Cores, who was sitting next to Wahl at the game, said.

"I’m in shock," Cores said. "He was working on his story on his laptop, it was about 4 minutes before the end of the extra time."

Wahl's brother, Eric, announced his death on Instagram and made an emotional plea for help. 

"I am gay. I am the reason he wore the rainbow shirt to the World Cup," Eric Wahl said. "My brother was healthy. He told me he received death threats. I do not believe my brother just died. I believe he was killed, and I'm just begging for any help."