HERAT (AFP) - Bomb attacks on Friday killed 23 people in Afghanistan, a deadly start to President Hamid Karzais second term that underscored spiralling insecurity nine years into the US-led war. A suicide bomber on a motorcycle struck the capital of the southwestern province of Farah, killing 15 people near the governors home. A roadside bomb targeted a controversial warlord, who escaped unscathed but killed five of his bodyguards northwest of Kabul, while a similar device, of the type favoured by Taliban insurgents, killed three civilians in the east. government is at its deadliest in the eight years since US-led troops ousted the Taliban, and is slowly encroaching into once peaceful parts of the north and west. The suicide bomber damaged buildings in Farah in an area where heavy trucks were being loaded, officials said. The bomber riding on a motorcycle detonated himself at a main square near my working office in my home, provincial governor Rohul Amin Amin told AFP. Fifteen people have been killed, the governor said. Apart from a police officer, all the dead were civilians, Amin added. About 38 other people were wounded, officials said. More than a dozen were in a critical condition. Karzai condemned the brutal and unforgivable attack on civilians, said a statement from his office. In the capital Kabul, a roadside bomb ripped through the convoy of Abdul Rab Rasoul Sayaf, a pro-Karzai warlord-turned-lawmaker who survived. Five of his bodyguards were killed, police said. A bomb planted on the side of the road was detonated as his (Sayafs) convoy passed by, district police Chief Abdul Razaq Quraishi told AFP In the eastern province of Khost, a roadside bomb tore through a civilian car, killing three non-combatants, local police said. Four attacks have hit Afghanistan since Karzai was inaugurated. Two US soldiers and 10 civilians were killed in two separate bombings on Thursday. The suicide bomber damaged buildings in Farah in an area where heavy trucks were being loaded, officials said. The bomber riding on a motorcycle detonated himself at a main square near my working office in my home, provincial governor Rohul Amin Amin told AFP. Fifteen people have been killed, the governor said. Apart from a police officer, all the dead were civilians, Amin added. About 38 other people, mostly civilians, were wounded, officials said. More than a dozen of the wounded were in critical condition. Abdul Jajbar Shayeq, a doctor in the towns main hospital, confirmed the casualties. Karzai condemned the brutal and unforgivable attack on civilians, said a statement from his office. Taliban spokesman Qari Yousuf telephoned Reuters from an undisclosed location and denied his group had carried out the Farah raid. Whenever there are civilian casualties, the Taliban deny responsibility, said Farah Governor Amin. This attack was definitely carried out by the Taliban. In the eastern province of Khost, a roadside bomb similar to those used by Taliban insurgents ripped through a civilian car, killing three non-combatants, local police said. Four other people, all members of one family, were wounded in the blast, Gul Dad, a senior provincial police official, told AFP.