Boy was mauled to death, his sister managed to escape and raised alarm.
In earlier case, brown bear plundered graves and ate human remains.
So what caused this abearation spotted by tourists in Kamchatka?
New 'bear security rules' follow mailings of humans from hungry animal in remote towns and villages.
One region has shot 58 ravaging brown bears this year because they intrude too close to settlements, destroying livestock.
Rare appearance of bear close to Novosibirsk leads to warnings to residents.
She uses her voice to send the mother and cub on their way.
Schools and kindergartens ordered to keep students indoors in Kirovsky.
Quadcopter makes monitoring bear population easier in Kuznetsk Alatau Nature Reserve.