Around 3,000 people have been evacuated from their homes amid growing fears of a major volcanic eruption in Iceland.
The country's Civil Protection Agency ordered a complete evacuation of Grindavik, a fishing town south-west of the capital Reykjavik.
It comes as scientists say the underground flow of magma is several times greater than previously measured in the Reykjanes peninsula.
The region's Fagradalsfjall volcano system had been dormant for many centuries until lava fountains erupted from a huge fissure in the ground in 2021.
The activity carried on for six months. Another eruption occurred the following year.
Recent tremors and the magma movement have sparked fears of a major surge. The country's Meteorological Office said there was a "considerable" risk of an explosion.
Tourist attraction the Blue Lagoon geothermal spa has been closed over the eruption threat.
In 2010, volcanic ash from an eruption in Iceland brought air travel across Europeto a standstill for eight days.