Negotiations are said to be continuing to secure the release of a Scottish human rights worker and her visiting parents who were kidnapped by gunmen in Rafah yesterday. Kate Burton, a 25-year-old worker at the Palestinian rights group Al Mezan, was showing her visiting parents around the chaotic southern border town when they were abducted. Palestinian authorities have so far failed to identify the kidnappers, security sources said. They began contacts with an armed group on Wednesday, but later found it was not involved. The abduction is the latest of several kidnappings that have undermined the Palestinian Authority’s attempts to establish order in Gaza following Israel’s pull-out three months ago.