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KABUL, Afghanistan (CNN) -- A rocket struck the presidential palace in Afghanistan's capital, Kabul, two days before Afghanistan's elections, a palace official said Tuesday.

One person was injured in the attack, in which two rockets were launched, the official said.

The attack comes as Afghan and U.S. military forces are scrambling to provide security for the August 20 presidential and provincial council elections.

On Saturday a suicide bombing killed seven people and injured 91 in Kabul. The bombing occurred near the main gate of NATO's International Security Assistance Force, wounding several coalition troops.

The Taliban claimed responsibility for that attack, which heightened security concerns about the election. The Taliban have vowed to disrupt the voting.

Watch the effect of the attack on voters »

Earlier this month a pre-dawn salvo of at least eight rockets slammed into Kabul, one of them striking within several hundred yards of the U.S. Embassy.