The Icelandic authorities have imposed a local flight ban after the country's most active volcano, Grimsvotn, began erupting.

A plume of smoke has risen 20km (12 miles) into the sky from the volcano.

But Iceland's Meteorological Office says the eruption should not cause widespread disruption to air traffic.

Last year, ash clouds from another Icelandic volcano, Eyjafjallajokul, led to the closure of a large section of European airspace.

Governments feared that ash particles could cause aircraft engines to fail, and the closure caused chaos to air travellers.

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