Several instances are described on the Darwin Awards site
"More than 250 people worldwide have died while taking selfies in the last six years, according to a new study from researchers associated with the All India Institute of Medical Sciences, a group of public medical colleges based in New Delhi. The findings, which analyzed news reports of the 259 selfie-related deaths from October 2011 to November 2017, were published in the July-August edition of the Journal of Family Medicine and Primary Care.More than 250 people worldwide have died taking selfies, study finds -- The Washington Post
Of the 259 deaths, researchers found the leading cause to be drowning, followed by incidents involving transportation — for example, taking a selfie in front of an oncoming train — and falling from heights. Other causes of selfie-related deaths include animals, firearms and electrocution."