Non-essential U.N. staff across Afghanistan have been ordered to pack their bags and be ready for evacuation after a deadly attack on a U.N. guesthouse. A senior U.N. official today said the staff members will leave the country because of security concerns and a smaller staff will reduce exposure during the upcoming presidential runoff, but will not affect U.N. capabilities to support the election. The order comes a day after Taliban militants stormed the guesthouse in an early morning raid yesterday killing five U.N. staff members and wounding nine others. At least 25 U.N. employees, including 17 members of the U.N. election team, were staying at the guesthouse, at the time of the attack. The United Nations said it was reviewing its security procedures in the aftermath of the attack.