in the spinal column, with an upper end plate and a lower end plate for securing respectively to the bones of the vertebral bodies, and with a sliding bearing which is arranged between the end plates and is composed of sliding bodies that are designed to slide on each other, both end plates being made of plastic and the sliding bodies being made of ceramic, the sliding bodies being encapsulated by the plastic of the end plates, and the surface regions of the sliding bodies encapsulated by the plastic of the end plates having surface-area enlargements by comparison with flat surfaces.Image copyright AP Image caption Arrested members of the jirga, their faces covered, are to appear in court in Abbottabad

Police in Pakistan say village elders ordered the murder of a teenage girl because she had helped a school friend to elope.

The 16-year-old was kidnapped from her home near Abbottabad, in Khyber Pakhtunkhwa, and put inside a vehicle that was set alight, police said.

Graphic images of her body have been circulated on social media.

Police say the victim's mother and the leader of the local council, or jirga, are among several people arrested.

The killing has been linked to orders given last week by the jirga, a traditional assembly of elders, in Makol village, Pakistan's Dawn newspaper reported.

According to police, the 15-member jirga had ordered the girl, named as Amber, to