At least 13 jade mine workers and security guards in northern Myanmar were killed in a landslide Sunday, authorities said, as rescuers frantically searched for more victims.Dozens die each year in landslides caused by jade mining, a dangerous and poorly regulated industry in Kachin state between the country's borders with China and India.Myanmar's fire services department said in a Facebook post the accident happened in the early morning in Hpakant township."We have sent two in