Ukraine said yesterday its troops had wrested more territory from pro-Russian rebels, advancing towards the site where Malaysian flight MH17 was brought down, which international investigators said they could not reach because of the fighting.

Troops recaptured two rebel-held towns near the crash site and were trying to take the village of Snezhnoye, near where Kiev and Washington say rebels fired the surface-to-air missile that shot down the airliner with loss of all 298 on board, Ukrainian officials said.

One pro-government militia said 23 of its men had been killed in fighting in the past 24 hours, while a rebel commander said he had lost 30 soldiers.

Black box recorders show plane was destroyed by shrapnel from missile blast

Analysis of black box flight recorders from the airliner showed it was destroyed by shrapnel from a missile blast which caused a “massive explosive decompression”, a Ukrainian official said yesterday.

Investigators in Britain, who downloaded the data, had no comment.

They said they had passed information to the international crash investigation led by the Netherlands, whose nationals accounted for two-thirds of the victims.

In a report on three months of fighting between government forces and separatist rebels who have set up pro-Russian “republics” in the east, the United Nations said more than 1,100 people had been killed.

UN High Commissioner for Human Rights Navi Pillay said increasingly intense fighting in the Donetsk and Luhansk regions was extremely alarming and the shooting down of the Malaysian airliner on July 17 may amount to a war crime.

Western leaders say rebels almost certainly shot the airliner down by mistake with a Russian-supplied surface-to-air missile. Russia accuses Kiev of responsibility.

The separatists are still in control of the area where the plane was shot down but fighting in the surrounding countryside has been heavy as government forces try to drive them out.

Yesterday, at least three civilians were reported killed in overnight fighting, and Kiev said its troops recaptured Savur Mogila, a strategic piece of high ground about 30 km from where the Malaysia Airlines Boeing hit the ground, and other areas under rebel control.

Rebels denied Savur Mogilahad been lost, saying fighting was continuing.

A spokesman for Ukraine’s Security Council, Andriy Lysenko, said Kiev was trying to close in on the crash site and force the rebels out of the area but was not conducting military operations in the immediate vicinity.

He said Ukrainian troops were now in the towns of Torez and Shakhtarsk, both formerly held by the rebels, while fighting was in progress for Snezhnoye and Pervomaisk. The towns are all located in rolling countryside near the wheat and sunflower fields filled with debris from the downed airliner.

Government troops were also readying an assault on Gorlovka, a rebel stronghold north of the provincial capital Donetsk.

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