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Afghan authorities say they have arrested at least six people believed to have been involved in Wednesday's deadly attack on a United Nations guesthouse in Kabul.

Afghan intelligence chief Amrullah Saleh announced the arrests Saturday.

The Taliban assault killed five foreign U.N. employees and at least two Afghan guards.  The three attackers also were killed.

The Taliban said the attack was the first step in a plan to disrupt Afghanistan's November 7 presidential runoff election.

Militants stormed the U.N. residence around dawn wearing suicide vests.  U.N. security officers battled them for at least an hour before NATO troops and Afghan police showed up.

United Nations officials have questioned why it took so long for reinforcements to arrive and they called for a strengthening of security measures.

Some information for this report was provided by AP.