BBC News | Inside Kosovo

The world was alerted to the fate of the men of Posto Selo on 11 April when Nato, acting on information supplied by the Kosovo Liberation Army, revealed that it had turned its spy satellites onto the area north of Orahovac - and found mass graves.

The before-and-after photographs of the area showed long lines of graves had appeared in the ground outside the village. Nato's leaders presented it as evidence of the scale of the slaughter in Kosovo.

At the time Belgrade angrily denied the claims as western propaganda. The BBC's Panorama programme discovered that the graves did exist - and 120 men were massacred in a matter of hours.

The horror began on 2 April when Serbian security forces shelled the small village and began setting fire to homes. Terrified by the onslaught, villagers headed for a nearby field where they were herded together by tanks.

Satellite pictures: Revealed fresh graves

Faced with no choice, the villagers surrendered to the Serb forces who immediately separated the "adult" males from the women and children. Witnesses say that many of the young men from the village had already fled, fearing for their lives. Witnesses told Panorama that the Serb forces had been ordered to release only those males under the age of 13.

Paramilitary forces ordered the women to leave the village and, according to Human Rights Watch, then ordered the males to hand over money and identity cards.The paramilitary police separated males into four groups according to their age and took them, one group at a time, to be shot.

Witnesses who filmed the aftermath say that seven or eight paramilitary police carried out the killings. In total, 120 men died. The youngest was a boy of 14 years old.

120 dead: Youngest was 14 years old

Serb forces did not leave the village immediately. Some of the bodies were removed and set alight in a house.

Once the forces had finally left, the remaining villagers came out of hiding to find almost all the men of the village dead.

The 13 who survived largely did so because they had been shielded from the bullets by other bodies. In harrowing scenes documented with a video camera, the surviving villagers buried the dead, facing the bodies towards Mecca, and then went back into hiding.

On 24 April, 13 days after Nato released its satellite evidence, Serb forces returned to Posto Selo - this time with a truck and a bulldozer.

Taher Limani: Massacre survivor

Taher Limani, a villager who watched the arrival while in hiding, described how they filmed the Serbs opening the graves and removing the bodies.

"We were watching from the hill but we did not dare come into the village because all the forces were there," he told Panorama. "Some of them were wearing yellow protective clothing and there were two trucks. They took the bodies, that was even harder than the day when they killed us."

When Panorama arrived in the village, shallow depressions still existed in the field where the bodies had been buried. Bloodstains could still be seen in the mosque where some of the bodies had been taken prior to burial.

Victims: Reburied in another village

Villagers who had found a Serb medical card at the scene showed it to Panorama who linked it to Trajko Vasiljivec, an undertaker from Orahovac.

After the bodies were removed, undertakers including Trajko Vasiljivec are believed to have helped transport the dead to another village, Zrze, where they were reburied as if they had died naturally.

These second graves were easy to identify - not all of them face Mecca and names identifying the plots are spelt in an unlikely mixture of Albanian and Cyrillic script.