Six killed in Kabul suicide blast

A suicide bomber tore through the Afghan capital, killing at least six people near the site where thousands of elders are to gather next week to discuss a controversial security agreement with the United States, officials said.

Authorities said 22 people were wounded in the powerful blast in Kabul, which mangled a dozen cars and destroyed shops nearby. Ambulances raced away with the wounded.

The explosion came just hours after president Hamid Karzai announced that US and Afghan negotiators had finished a draft deal to be presented to the Loya Jirga, whom Kabul says must approve the document before Afghanistan signs it.

The explosive-laden vehicle rammed into an armoured vehicle posted about 200 metres from the giant tent where the Loya Jirga is to be held, defence ministry spokesman Gen Mohammed Zahir Azimi said.

No group immediately claimed the attack, though blame is likely to fall on the Taliban, who have adamantly opposed the presence of any foreign soldiers in Afghanistan.

Mr Karzai has called 3,000 elders, clerics, parliamentarians and other influential figures to debate the Bilateral Security Agreement, which would allow US troops to remain in Afghanistan after the final withdrawal of international combat troops at the end of 2014.

Without approval of the Loya Jirga, Afghanistan is likely to refuse to sign the agreement, Mr Karzai said. If the Loya Jirga does approve it, the agreement still requires final approval from parliament.

US officials refused to comment on the draft, describing the effort as an ongoing diplomatic process. Mr Karzai provided few details regarding how and when the draft was finalised, but said there still remain "differences" between Washington and Kabul on the deal.

Negotiations have been protracted and often acrimonious. In the end it took a surprise visit to Afghanistan in October by US secretary of state John Kerry to produce the outlines of a deal.

The sweeping document incorporates the usual Status of Forces Protection Agreement, which the US signs with every country where its troops are stationed, along with a wide range of other clauses. It covers everything from customs duties on goods the US imports for its troops and development projects to the question of whether a US service member could be prosecuted for criminal offences in an Afghan court.