Reports say a large explosion has rocked Kabul's diplomatic district, followed by gunfire.
The explosion in the district of Wazir Akbar Khan, which houses embassies and foreign compounds, followed an attack earlier on November 27 on a British Embassy vehicle that killed six people, including one Briton.
The suicide bombing, which wounded more than 30, came the same day as Afghanistan's upper house of parliament overwhelmingly approved two separate security agreements allowing some 12,500 foreign troops to remain in Afghanistan beyond December 2014.
Eyewitnesses say the powerful blast shook parts of Kabul and sent a plume of dust and smoke into the air.
The Taliban claimed responsibility for the attack, saying the suicide bomber "targeted foreign invading forces."
Based on reporting by Reuters, AFP and BBC