US security personal escorts a convoy to the Kabul police headquarters. (Reuters)

A US adviser has been killed by an Afghan policewoman in Kabul and an investigation is now underway to determine whether the incident was intentional or accidental.

Mohammad Daoud Amin, deputy police chief in Kabul, confirmed the US adviser had died but would not provide further details on the circumstances surrounding the death.

The identity of the victim is unknown at present and it is unclear whether they were a civilian or military adviser.

According to the BBC, the adviser was shot dead. The policewoman has been detained and officials suspect she has links with the Taliban.

NATO said it is investigating reports of a shooting but has no independent information.

This year, over 50 international troops have been killed by Afghan soldiers or police and more incidents are currently under investigation.

More than 50 Afghan members of the government's security forces have also died in insider attacks this year, and Taliban militants claim this reflects the growing opposition to foreign military and the Kabul government.

The increase in insider attacks has raised concerns over the ability of Afghan security forces to cope when international troops withdraw from the country in 2014.

Rights for women

The US adviser's death comes as a senior Afghan government official said Pakistan shares the Kabul government's goal of turning the Taliban insurgency into a political movement.

He told Reuters: "They have told us that they share the vision contained in our roadmap which is basically to transform the Taliban from a military entity into a political entity, to enable them to take part in the Afghan political process and peacefully seek power like any other political entity in Afghanistan. This is the vision that they share."

The official said that recent talks between Afghan officials in France and senior Taliban members have been helpful in building an environment for peace.

Taliban representatives said they do not want total power in Afghanistan and have pledged to grant rights to women, which the group has repressed in the past.

A statement from the Islamist group promised that women would be allowed to choose husbands, own property, attend school and work - all of which they were denied during the Taliban rule that ended in 2001, following the US invasion.

Zabihullah Mujahid, who emailed the speech to a conference in France, said: "We are not looking to monopolise power. We want an all-Afghan inclusive government,"