Afghan security forces battled gunmen following a suicide attack outside the Iraqi embassy in the capital, Kabul, BBC reports.
A bomber blew himself up at the gate of the embassy in the central Shar-e-Naw neighbourhood, then three other attackers entered the compound, the Afghan interior ministry said.
Although the ministry said the siege had ended, reports of gunfire continued.
At least 24 people have been killed and 42 wounded after a Taliban car bomb struck a bus carrying government employees in western Kabul yesterday, officials said, the latest attack to strike the Afghan capital.
"The car bomb hit a bus carrying employees of the ministry of mines during rush hour," interior ministry spokesman Najib Danish told AFP.
The people of war-torn Afghanistan continue to bear the brunt of the grinding conflict with civilian deaths at their worst since records began, the United Nations said on July 17.
Deaths in the capital Kabul accounted for nearly 20 percent of the toll, according to the U.N. Assistance Mission in Afghanistan (UNAMA) report, which covers the first half of the year.
Taliban gunmen have killed eight Afghan guards working at the largest American base in Afghanistan, officials said yesterday, as the U.S. appears set to boost its troop presence in the country.
The guards were ambushed near Bagram base north of Kabul as they were driving home in a convoy late June 19, said district governor Abdul Shakoor Quddusi.
As many as three Afghan civilians were killed early on June 12 when American troops opened fire after their vehicle struck a roadside bomb, an official in eastern Nangarhar province said.
A man and his two sons were killed at their home in Ghani Khel, a district in the south of Nangarhar, on the border with Pakistan, said Attaullah Khogyani, a spokesman for the provincial governor.