When two bomb explosions in western Afghanistan for more than 20 civilians have been killed. A roadside bomb exploded hidden according to the authorities in the western province of Herat, when a van drove by. A spokesman for the provincial government said all 22 passengers were killed. Among the casualties were women and children. The van was reportedly on the way from the provincial capital of Herat in the Obe district near the neighboring province of Baghdis.With the explosion of a second explosive device is reported to have killed a woman and injured seven men who were in a truck traveling in the same district. The spokesman made the authorities Taliban responsible for the bombings.Previously, in a suicide attack on a U.S. command, which is under military base in eastern Afghanistan, two Afghan guards were killed. The bomber blew himself up outside the entrance of the heavily guarded base in Gardez in Paktia province with a vehicle in the air as the provincial police chief, Abdul Ghafar Sapai said.According to a military spokesman was the first man at the barricade at the entrance stopped by the guards and then lit his bomb. The barricade was, police said more than a hundred meters away from the original entrance to the base, which have been stationed as part of a so-called Provincial Reconstruction Teams (PRT) and U.S. soldiers. The police chief said that "good security" at the base, including concrete blocks to protect against explosions had prevented more casualties. NATO's ISAF troops did not initially expressed about the incident. The Taliban claimed responsibility for the attack.