A large fire has broken out a a Shell chemical refinery in the Netherlands, according to local media.
People nearby heard two huge bangs and saw a flash of light, the reports say.
It is not yet known if there are casualties or the extent of the damage.
Images on social media show a fireball rising from the plant which is in Moerdijk, south of Rotterdam.
More top news
Charles Bronson - Britain's most notorious prisoner- has sent Alton Towers crash victim Leah Washington a get well picture
Susannah Mushatt Jones from New York is known as Tee, short for auntie, to her 100 nieces and nephews.
The tweet said: "Our lionesses go back to being mothers, partners and daughters today, but they have taken on another title - heroes."