Four people have been arrested in Malaysia’s southern state of Johor after videos circulating online appeared to show an Indonesian domestic worker being slapped, punched and verbally abused inside a private home. The footage has renewed concerns about the treatment of Indonesian helpers in Malaysia – where about 60,000 are registered to work in private homes – and prompted calls for Jakarta to intervene. Two sisters and their husbands, aged 30 to 34, were arrested at a house in Taman Johor,...