VOICED : Decenas de muertos tras ataque en Kabul

On Tuesday, Kabul experienced a deadly attack where at least 28 people, mostly civilians, were killed. A truck bomb exploded near the National Directorate of Security, causing widespread damage and injuries. Islamist rebels claimed responsibility for the suicide attack, a common tactic against Afghan security forces. The Taliban had recently announced a new offensive targeting NATO soldiers, demanding their withdrawal.

Which group claimed responsibility for the suicide attack?

What did the Taliban announce a week prior to the attack?