SHAKHTARSK, Ukraine -- Panicky residents in an eastern Ukrainian town fled their homes Monday carrying a few possessions in plastic bags and small suitcases as shells exploded in the distance, fighting that also prevented an international police team from reaching the area where the Malaysia Airlines plane was downed.
"Mom, hang in there," exclaimed a weeping woman who was fleeing Shakhtarsk with her mother. Associated Press reporters saw a high-rise apartment block in the town being hit by at least two rounds of artillery.
The fighting there and elsewhere in the area kept Dutch and Australian police for the second day from reaching the site where the plane crashed after being shot from the sky. They had planned to begin searching for remaining bodies and gathering forensic evidence and the delay strained tempers among international observers.
"There is a job to be done," said Alexander Hug, the deputy head of a monitoring team from the Organization for Security and Cooperation in Europe. "We are sick and tired of being interrupted by gunfights, despite the fact that we have agreed that there should be a ceasefire."
The plane was downed on July 17 while flying over a part of eastern Ukraine where government forces and pro-Russia separatist rebels have been fighting for months. Ukrainian and Western officials say the plane was shot down by a rebel missile, most likely by mistake, and that Russia supplied the weapon or trained rebels to use it.
A Ukrainian official said Monday that data from the recovered flight recorders show that Malaysia Airlines Flight 17 crashed due to a massive, explosive loss of pressure after being punctured multiple times by shrapnel. Andriy Lysenko, spokesman for Ukraine's national security council, said the plane suffered "massive explosive decompression" after it was hit by fragments he said came from a missile.
There were signs that government forces were gaining some ground in their fight with the rebels.
The rising loss of life was underlined by a report released Monday by the United Nations.
The U.N. High Commissioner for Human Rights said that at least 1,129 people have been killed between mid-April, when fighting began, and July 26. The report said at least 3,442 people had been wounded and more than 100,000 people had left their homes. A U.N. report from mid-June put the death toll at 356.
Navi Pillay, the U.N.'s top human rights official, also called for a quick investigation into the downing of the plane, which she said may be a war crime.
The U.N. said rebel groups continue to "abduct, detain, torture and execute people kept as hostages in order to intimidate" the population in the east. It said rule of law had collapsed in the rebel-held areas and that 812 people had been abducted in the Donetsk and Luhansk regions since mid-April.