KABUL (AFP) - Afghanistan said Thursday it would negotiate with the Taliban to bring their insurgency to an end " but only if they accept the new constitution. Foreign Minister Rangeen Dadfar Spanta reiterated that only former officials of the Taliban government were at recent talks in Saudi Arabia, not current representatives of the insurgent movement as reported in the media. "Peace requires that we talk with the armed opposition, including Taliban , but there are some lines that we cannot and must not cross and that is our constitution," Spanta told a press briefing. This meant acceptance of the post-Taliban constitution's provisions for principles such as women's rights, free media and democracy were non-negotiable, he said. Spanta reiterated the government's long-held position that any Taliban wanting to enter negotiations would also have to agree to give up their weapons and pursue their ideological agenda through political means. "Along the lines above, there were some talks in Saudi Arabia. It was a forum for talks between Afghans," he said, referring to meetings in September. Among those present were former Taliban officials who have already accepted the new constitution and system, he said. They included former Taliban foreign minister Wakil Ahmad Muttawakil and their envoy to Islamabad, Abdul Salam Zaeef, who have told AFP they do not represent Taliban and have been disowned by the organisation. Both were arrested soon after the Taliban were ousted in a US-led invasion in late 2001 and freed years later. Also at the Ramazan meeting in the holy city of Mecca was a brother of President Hamid Karzai and Afghan religious leaders. Spanta said there was no "result" and it was not clear if there would be further meetings. The Taliban insurgency has grown steadily despite the presence of tens of thousands of international troops helping the Afghan security forces and there is consensus that the violence will not be ended solely through military means. Karzai has called on Saudi Arabia to host negotiations between the Taliban and government. Saudi Foreign Minister Saud al-Faisal said this week that if there were a willingness among Afghan parties to resolve their problems politically, the country would make more attempts to bring groups together for talks. A senior US official said in Kabul Thursday Washington supported talks based on the principles espoused by the Afghan government, including that Taliban must agree to cut all ties to Al-Qaeda and return home in peace. "We think this makes a very sound approach to any sort of peaceful resolution," Deputy Assistant Secretary for South and Central Asian Affairs, Patrick Moon, told reporters at another briefing. Asked if talks could encompass Taliban leader Mullah Mohammad Omar and Gulbuddin Hekmatyar, head of another radical faction, who are both on a US blacklist, Moon said such men would be dealt with on a "case by case basis". "Mullah Omar has been a very outspoken, very violent opponent of the people of Afghanistan," he said.