A new examination of skulls from the royal cemetery at Ur, discovered in Iraq almost a century ago, appears to support a more grisly interpretation than before of human sacrifices associated with elite burials in ancient Mesopotamia, archaeologists say.

Palace attendants, as part of royal mortuary ritual, were not dosed with poison to meet a rather serene death. Instead, a sharp instrument, a pike perhaps, was driven into their heads.

Archaeologists at the University of Pennsylvania reached that conclusion after conducting the first CT scans of two skulls from the 4,500-year-old cemetery. The cemetery, with 16 tombs grand in construction and rich in gold and jewels, was discovered in the 1920s. A sensation in 20th century archaeology, it revealed the splendor at the height of the Mesopotamian civilization.

The recovery of about 2,000 burials attested to the practice of human sacrifice on a large scale. At or even before the demise of a king or queen, members of the court  handmaidens, warriors and others  were put to death. Their bodies were usually arranged neatly, the women in elaborate headdress, the warriors with weapons at their side.