An enormous iceberg has broken off a glacier in a lagoon at a national park in southern Chile.

The Chilean government's National Forestry Corporation tweeted a picture of the rupture on Tuesday.

Officials at the Torres del Paine National Park have said the cause of the rupture of the so-called Grey Glacier is unclear, although many will point to  the Earth's ever-increasing temperature.

Such breaks in the ice at the park are rare and have not occurred since the early 1990s, they added.