KABUL: Afghanistan’s feuding presidential rivals agreed on Saturday to a full audit of every vote cast in the disputed runoff election, US Secretary of State John Kerry said following two days of frantic negotiations.

The deadlock over last month’s run-off vote to succeed outgoing President Hamid Karzai plunged Afghanistan into crisis and dented US hopes of a smooth transfer of power as Washington seeks to withdraw all its troops by late 2016.

Preliminary results of the second-round vote put Ashraf Ghani in the lead, but Abdullah Abdullah – who has already once lost a presidential bid – declared himself the true winner, saying massive fraud robbed him of victory.

The stand-off sparked concern that protests could spiral into ethnic violence and even lead to a return of the fighting between warlords that ravaged Afghanistan during the 1992-1996 civil war.

But after two days of intense talks brokered by Mr Kerry, the rivals reached an agreement late on Saturday evening.

“Both candidates have committed to participate in and stand by the results of the largest most possible audit. Every single ballot that was cast will be audited, all eight million,” Mr Kerry told reporters.

“The winner will serve as president and will immediately form a government of national unity.”

The deal went further than a UN proposal made late on Thursday to audit just over 8,000 polling stations where suspicions of ballot-stuffing had been raised – around 44 per cent of the total votes cast.

The chief US diplomat said the audit would be carried out in Kabul and begin within 24 hours, with Nato and Afghan forces transporting ballot boxes to the capital.

Published in Dawn, July 13th, 2014