KABUL - Afghan police say a suicide bomber has struck in the centre of Kabul near the headquarters of the intelligence service and the Afghan Interior Ministry.
The explosion sounded about noon local time and could be heard throughout downtown.
Gunshots continued to ring out throughout the heavily guarded neighbourhood about half an hour later as a plume of smoke rose into the sky.
A police officer at the scene named Abdul Shookur said the attack started with a suicide bombing but did not provide further details.
It was not clear if the ongoing shooting was a sign of additional attackers.
A spokesman for the international military coalition in Afghanistan confirmed an explosion and small arms fire but did not provide further details.