A man who embarked on a 30km (19-mile) protest walk barefoot and splashed fish sauce on a portrait of Cambodia’s Senate leader and former prime minister Hun Sen outside the country’s embassy in Bangkok was briefly detained but later released by Thai police. Angered by Cambodia’s actions during a recent border clash with Thailand, 69-year-old retired tennis coach Thewa Sritawan walked for almost five hours from his home in Pak Kret, in neighbouring Nonthaburi province, at dawn on Monday to carry...