Taliban insurgents appear to be making good on threats to kill candidates in Afghanistan's parliamentary elections, adding a grim dimension to the ambitions of political hopefuls in the war-torn country. In recent weeks, three candidates and at least seven campaign workers have been killed, and many others kidnapped and injured, in attacks blamed on the Taliban, according to officials. More than 2,500 candidates will contest 249 seats in the lower house of the Afghan parliament, the Wolesi Jirga, in the country's second parliamentary elections scheduled for September 18.The attacks are part of the Taliban's plan to disrupt the poll, said a spokesman for the group, deriding the election as "a process orchestrated by the foreign occupiers, for and in the interest of the foreign occupiers". The Independent Election Commission (IEC), which oversees the poll, has said that about four percent of the polling centres, mainly in the south and east where the war is fiercest, will not open because security cannot be guaranteed. Candidates and their supporters have been bombed, kidnapped, shot and, in one case in troubled Ghazni province south of Kabul, beheaded.In the latest incident, 28 IEC employees were reportedly kidnapped on Thursday in northern Baghlan province, and released after the intervention of tribal elders. Reports said they had been tortured by their Taliban captors and warned not to work for the IEC.Their ordeal followed the kidnap in eastern Herat a week earlier of 10 people working for candidate Fawzya Galani.