Heavyweight boxer Francis Ngannou's young son has died.
The fighter posted a distraught message on social media on Monday night asking: "Why is life so unfair and merciless?"
According to reports in his native Cameroon Ngannou's son was 18 months old.
"What's the purpose of life if what we're fighting tooth and nail to get away from is what finally hit us the hardest!?" he added on X.
The fighter's manager Marquel Martin posted online saying that he along with "millions of others" will be praying for him.
Conor McGregor was among the fighters and fans to send their condolences to the 37-year-old boxer and former mixed martial arts (MMA) star.
"I am so sorry to hear of your loss Francis, my prayers are with you and your family at this time," the Irishman replied on X.
Ngannou's last bout was a heavy defeat by Anthony Joshua in Saudi Arabia. After the fight he dismissed the suggestion of returning permanently to MMA where he made his name.