At least two people have been killed in an explosion outside the international airport in the Afghan capital, Kabul, sources have told Al Jazeera.
Afghan police confirmed the Tuesday's blast, but said they did not yet have other details.
According to reports, the blast rattled windows in the centre of the city and smoke was seen rising from a part of eastern Kabul.
The airport is used for both civilian and military purposes. It also serves as a base for foreign troops fighting the Taliban.
The US military was quoted by the Associated Press as confirming the blast, saying that an investigation was underway, but did not have details on the incident.
PHOTO CAPTION
Map of Afghanistan locating the capital Kabul
Al-Jazeera