India has long struggled with religious violence, but in recent months the problem has taken a gruesome new form. Across the country, gangs of Hindu men have lynched Muslims who they accuse of killing cows or eating beef. Known as cow vigilantes, in some instances mobs have killed or injured more than 150 people since 2015. India's Prime Minister, Narendra Modi, has made a plea for calm, but 2017 is set to be the worst year for attacks to date. Reporter Mirren Gidda meets a group of vigilantes, unconnected to any killings, who take her on one of their nightly hunts for people who may be harming cows. She also meets Muslim families who've lost loved ones to the mobs, among them a mother whose 16-year-old son was stabbed to death. Her report is an emotional account of the tensions and violence spreading across India, and provides a detailed look at why the vigilantes do what they do.

Every year around 300,000 British tourists visit the white sand beaches and turquoise waters of Cancún, the jewel in Mexico's $20 billion tourism industry. But after a spate of brutal murders, the US government has warned travellers about the risks associated with growing violent crime in the city. Reporter Krishnan Guru-Murthy and director Patrick Wells travel to the country to investigate why the murders are taking place and whether Cancún risks going the same way as Acapulco: once the premier tourism resort in Mexico, but now one that virtually no foreigners visit.