The results of Afghanistan's presidential election that were due on November 14 have been postponed for a second time, the election commission said on Wednesday. 

"The announcement of the preliminary result will not be announced tomorrow until the technical issues are addressed," election commission spokesman Abdul Aziz Ibrahimi said. 

It was reported on Sunday that the results were likely to be delayed after Abdullah Abdullah, the main challenger to incumbent President Ashraf Ghani said he would not agree to the addition of hundreds of thousands of votes to a planned recount. 

The election was held in late September. Both Ghani and Abdullah claimed victory and signaled they would not accept defeat.

Meanwhile, at least 12 people, including three children, were killed when a minivan packed with explosives rammed into a vehicle carrying foreigners during Kabul's morning rush hour Wednesday, officials said.

Four foreign nationals were among those wounded in the attack that targeted an SUV belonging to a private Canadian security company, GardaWorld – in a crowded neighborhood that is near the Interior Ministry and north of Kabul airport.

"As a result of today's attack in Kabul, 12 people, including three children, were killed and 20 were wounded including four members of Gardaworld," Marwa Amini, an Interior Ministry spokeswoman, said. 

All those killed in the suicide attack were Afghan civilians, and the nationalities of the foreigners wounded were not confirmed. 

There was no immediate claim of responsibility. Both the Taliban and the ISIL group are active in the city, which is one of the deadliest places in the war-torn country for civilians.

The blast came one day after Ghani announced that Kabul would release three high-ranking Taliban prisoners in an apparent prisoner swap with Western hostages who were kidnapped by the insurgents in 2016.

(With input from Reuters, AFP)