Defence officials in Vietnam are investigating the origin of three metal spheres which fell from the sky in the north of the country.
The largest object weighs about 45kg (99lb) and was found near a stream in Tuyen Quang province, the Thanh Nien News website reports. Another orb landed in local resident's garden in the neighbouring Yen Bai region, while the lightest, weighing 250g (9oz), came down on a nearby roof before rolling onto the ground, the website says. Local people reported hearing what sounded like thunder in the minutes before the objects were found.
BBC
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