A prominent heir in Thailand's Singha beer business has been dismissed from the family firm following allegations of sexual abuse against his own brother. The company confirmed the dismissal.

One of Thailand’s richest men dismissed his cousin from the Singha beer business empire on Tuesday, the company said, after days of controversy over allegations the man had sexually abused his own brother. Environmental activist Siranudh Scott, a scion of the Bhirombhakdi family who control the beer brand ubiquitous in Thailand, posted an emotional video on his social media page this month accusing his elder brother of repeatedly abusing him in his teenage years. “Everyone in my family knows it....