Military Investigates 'Space Ball' Crash Landing In Vietnam

Three metal orbs have crash landed in Vietnam prompting a military-lead investigation.

The "space balls" fell to earth over the weekend, with the largest one weighing around 45kgs.

According to Thanh Nien News the first one was found in Tuyen Quang province.

The second landed in local resident's garden in a neighbouring region, while the third -- the lightest ball weighing around 250g -- fell on a roof.

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The website reports a local witness saying: "The sky was clear, suddenly we heard a thunder-like noise."

An initial investigation reports that the objects were manufactured in Russia and belong to a "specialised compressed air tanks."

However, it is not yet clear if the orbs belong to Russia.