"When we first heard one explosion we ran to the basement. And then suddenly, boom, boom, boom - countless explosions. I will never forget that sound."

With a broken hand and shrapnel still lodged in her chest, Sveta, 55, had just survived a multiple rocket attack on her village when I met her in a hospital in Donetsk in eastern Ukraine this week. The attack destroyed her house and forced most of the villagers to leave. Our investigation shows that Ukrainian armed forces are responsible for at least some of the attacks here that have killed civilians.

Fighting in eastern Ukraine is intensifying between insurgent forces who took control over several towns and cities in April, and Ukrainian armed forces who are trying to drive them out. Government forces recently retook several towns, forcing the separatists to consolidate in a couple of cities, including Donetsk, the regional capital that usually is home to almost a million people.

The fighting is taking an increasing toll on civilians. Both sides talk about hundreds of civilian casualties. While the numbers are hard to verify, it is clear that civilian casualty figures are significant.

One reason why so many civilians are getting injured and killed is the use of unguided rockets in populated areas, like the rockets that hit Sveta's village.

On July 12, for example, multiple rockets hit a residential area in the western part of Donetsk, killing seven civilians. One rocket killed four people from the same family, including two children, when it struck their home. In another attack the same day, multiple rockets hit another residential area just outside of Donetsk, killing six civilians. A more recent attack near the train station in Donetsk killed four civilians.

The rockets that hit these areas were so-called Grads. These three-metre-long rockets can strike targets up to 20km away, but they are incredibly imprecise. At their maximum range, they are accurate within a rectangle of 336 metres by 160 metres, which means that if you are trying to hit a building, you would be lucky to hit somewhere on the same block.

But the most terrifying aspect of Grads is that they are often fired in salvos. A Grad rocket launcher, a truck with a grid of tubes on its trailer, is capable of launching 40 rockets within seconds. Often, several trucks fire their rockets at an area simultaneously, raining down dozens of rockets. Grad, the Russian word for hail, is a fitting, though euphemistic, nickname. The rockets literally rain down.

The rest can be read at the link.

The number of civilians killed in this conflict have been between 600 to 1,200. Before anyone asks, I'm not pro-Russian separatist or pro-Ukrianian government.