This 16-foot-long metal cylinder of unknown origin recently washed up in a Siberian village following severe flooding. Nobody knows where it came from but Aleksey Yaskin, a professor of aerospace engineering at Biysk Technology University, told Reuters that it may be the first stage of a rocket.
This looks like the first stage [of a rocket] judging by its size... in order to identify which type of destroyed rocket it belonged to we need to come closer to its shell, but there is no such option at the moment.
Which makes sense, since rockets launched from Kazakhstan fly over this area. Much more mundane explanations of the object's source include recycled Soviet-era technology being used in agriculture.