HARARE, ZIMBABWE — One of Cecil the Lion's sons has been shot dead by trophy hunters in Zimbabwe. <br /> <br />The 6-year-old male named Xanda was killed last week not far from the spot where his father was taken two years ago, the Telegraph reported. <br /> <br />Xanda's death came to light because he was wearing an electronic collar that was fitted by researchers to track his movements. <br /> <br />Professional hunter Richard Cooke, who was also involved in the killing of Xanda's 4-year-old brother in 2015, handed the collar back to the researchers. <br /> <br />Xanda's death gets the OK from the authorities in Zimbabwe because he was aged over 6 and had strayed outside the protected area of a National Park. <br /> <br />Xanda had seven cubs under his watch and scientists warn they could now be killed by the male lion that replaces him as head of the pride, the Times reported. <br /> <br />The death of Cecil the Lion caused uproar in 2015 after he was killed by an American dentist who paid $65,000 dollars for the dubious privilege. <br /> <br />The Humane Society International have started an online petition urging Zimbabwe not to allow Xanda's remains to leave the country as a hunting trophy.