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.

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.

"The selfie deaths have become a major public health problem," Agam Bansal, the study's lead author, told The Washington Post.

Though the study found India to have the highest number of deaths of all countries, multiple reports of fatal selfie incidents have also come from Russia, the United States and Pakistan.

Bansal noted that while the simple act of taking a selfie isn't deadly, hazards arise when people take risks while trying to get that perfect shot.

"If you're just standing, simply taking it with a celebrity or something, that's not harmful," he said. "But if that selfie is accompanied with risky behavior then that's what makes the selfies dangerous."

Bansal added he was also concerned about how many of the selfie-related fatalities involved young people. More than 85 percent of the victims were between the ages of 10 and 30, Bansal said.

"What worries me the most is that it is a preventable cause of death," he said.

"Taking a toll on these many numbers just because you want a perfect selfie because you want a lot of likes, shares on Facebook, Twitter or other social media, I don't think this is worth compromising a life for such a thing."

While the number of deaths reported in the study may seem high, Bansal said there could be many more cases that just haven't been documented because of issues with reporting.

In 2018 alone, there have already been several selfie-related deaths. In May, a man in India tried to take a selfie with an injured bear and was mauled to death, the Independent reported.

Just last month, two people died in the United States in separate cases also involving selfies.

On September 5, an 18-year-old hiker from Jerusalem died after he fell more than 800 feet (243 metre) off a cliff at Yosemite National Park, according to ABC News.

The man's mother said he had been trying to take a selfie at the edge of Nevada Fall, a popular waterfall in the park, when he fell, the Times of Israel reported.

Roughly two weeks later, a 32-year-old California woman met a similar fate while hiking at Pictured Rocks National Lakeshore in Michigan when she slipped and fell to her death after stopping at the edge of a 200-foot (61 metre) cliff to snap some selfies, the Detroit Free Press reported.

Mohit Jain, an orthopedic surgeon who was not involved in the recent study but has done research into selfie deaths, described the work of Banal and fellow researchers Chandan Garg and Abhijit Pakhare as "really necessary" to "make people aware that you can die while taking a selfie."

Jain published his own study last year about selfie-related mortality in the International Journal of Injury Control and Safety Promotion.

"Sometimes eyes don't see if your mind doesn't know," Jain told The Post.

Jain's research found that 75 people had died attempting to take selfies from 2014 to mid-2016.

"It's like a man-made disaster," he said. "It's not a natural disaster."

One possible way to prevent selfie deaths would be "no selfie zones," Bansal said, banning them in certain areas such as bodies of water, mountain peaks and at the top of tall buildings.

Efforts to dissuade people from taking dangerous selfies have already been attempted in multiple countries, including India, Russia and Indonesia.

Three years ago, Russia launched a "Safe Selfie" campaign, which featured the slogan, "Even a million 'likes' on social media are not worth your life and well-being," the BBC reported.

An informational graphic with icons of "bad selfie ideas" - highlighting stick figures posing on power poles and while holding guns - was also distributed, Jain noted in his study.

In 2016, Mumbai declared 16 "no selfie zones" across the city following a slew of selfie-related deaths, The Guardian reported. Earlier this year, a national park in Indonesia announced it would be working to create a safe spot for photos after a hiker died taking a selfie, according to the Jakarta Post.