At least 20 people have been killed and 50 injured in a bomb attack in the Afghan capital Kabul.
The explosion was followed by a gun battle near the office of Vice Presidential candidate Amrullah Saleh, who was wounded in the incident.
Three attackers were killed and about 40 civilians were rescued by security forces.
No group has claimed responsibility for the attack.
The violence came on the first day of campaigning for the country's presidential election on September 28.

Trump says he does not need China's help to end Iran war
10 islanders flown to UK for precautionary isolation after hantavirus outbreak
US war in Iran has cost $29 billion so far, Pentagon says
At Temple of Heaven summit, Trump and Xi will seek a good harvest
Peace deal hopes fade after Trump rejects Iran proposal
