Three British nationals were wounded in the attack , an official says . - The U.S. Embassy is closed for a second day as security forces search for suspects and evidence after two explosions rocked Kabul's diplomatic compound on Monday morning. President Karzai condemns the attack .
Three British nationals were wounded in the attack , an official says . A suicide bomber in a car caused the blast , a governor 's spokesman says . President Karzai condemns the attack .