Authorities in Chiang Mai, a city in northern Thailand, are investigating the deaths of dozens of tigers at a popular tourist attraction this month. Seventy-two tigers died in the span of less than two weeks across two facilities of Tiger Kingdom Chiang Mai, a park where visitors can touch and interact with tigers. The local livestock department said samples from the tigers showed canine distemper virus - though authorities have not confirmed how the outbreak happened. Officials said on Monday that they had cremated and buried the remains of the tigers. They were among more than 240 tigers living across the two facilities at Tiger Kingdom Chiang Mai, according to local media. "By the time we realised they were sick, it was already too late," Somchuan Ratanamungklanon, director of the national livestock department, told local media - noting that it was harder to detect sickness in tigers compared to animals like cats or dogs.…