Two massive explosions in the port of Tianjin, northern China, have killed more than a hundred people, left hundreds more injured and devastated large areas of the city.
Much of what took place, or is still happening now, is unclear - but here is what we do know.
How did the blasts happen?
They took place at a warehouse at the port which contained hazardous and flammable chemicals, including calcium carbide, sodium cyanide, potassium nitrate, ammonium nitrate and sodium nitrate.
Officials insist it is not yet clear what triggered the blasts and say they are still investigating. Chinese media said that at least one member of staff from Tianjin Dongjiang Port Ruihai International Logistics, which owns the warehouse, has been arrested.