A rocket has exploded in the air above the US military compound in Kabul on the eve of Afghanistan's presidential poll. There were no casualties, according to a spokesman for the NATO-led International Security Assistance Force, which operates in the capital. The spokesman said the blast was about 200 to 300 metres from the US embassy compound. Security forces initially believed two rockets were fired at around 1.30 a.m. but after checks, they said that a single rocket had exploded before striking its target. The rocket's debris was found close to the election commission's media accreditation centre, which lies across the street from the US base. Hours earlier, two rockets were fired at another base used by an 850-strong Italian contingent on the outskirts of Kabul. The rockets missed the Italian base and there were no casualties **PHOTO CAPTION*** An Afghan policeman watches police vehicles leave a street where a rocket hit in Kabul. (AFP)