(190917) -- KABUL, Sept. 17, 2019 (Xinhua) -- An ambulance arrives at the scene of a blast in Kabul, capital of Afghanistan, Sept. 17, 2019. An explosion rocked Police District 9 in the Afghan capital of Kabul on Tuesday as the country is to hold a presidential election next week, police spokesman Ferdaus Faramarz said. (Xinhua/Rahmatullah Alizadah) (SPOT NEWS)AFGHANISTAN-KABUL-BLAST PUBLICATIONxNOTxINxCHN