The wild animal had strayed from the nearby Tsavo East National Park when it attacked the man in Makueni, Kenya, on Wednesday.
"It has been established that the area in which the group of tourists were camping is not a designated camping site," Namibia's Ministry of Environment and Tourism said in a statement alongside news of the death.
The homemade explosives have become the leading cause of death for elephants in Sri Lanka, where hundreds of the endangered animals are killed each year.
The guard's wife said she "never thought one of those animals would take his life" though her husband had described encounters with dangerous animals while working.
No visitors were at risk during the creature's escape, the zoo said.
Botswana, where trophy hunting is banned, currently has the largest elephant population on the continent.
Ancient DNA adds new elephant species to the mix.
Two people are killed by elephants on average each year in the area around the national park located in Thailand.
Melania Trump's son-in-law Donald Trump Jr. has previously been criticized for hunting and killing elephants.
Ganesha is one of Hinduism's most beloved deities and the story of his birthday reveals the reason for his unique appearance and demeanour.
Police called Kenia's visit "short and peaceful."
If the Arctic permafrost melts, greenhouse gasses equivalent to burning all of the world's forests two-and-a-half times over could be released.
"Deport callous cheating opportunists now! All nations have their undesirables," the PETA billboard states.
Twelve bales of hay, 10 watermelons, a bushel of apples and more were used for the move.
After months of uncertainty about the status of the ban, the president told Piers Morgan he plans to keep restricting hunters from bringing back the trophies.
The tusks were left unclaimed at the airport for more than two weeks.