Six Decapitated in Afghan Bank Heist Police think they were poisoned the night before By Newser Editors and Wire Services Posted Aug 3, 2010 8:44 AM CDT 4 comments Comments Afghan National Police and Afghan National Army secure the site of a bank where gunmen attacked in this August 19, 2009 file photo. (Getty Images) (Newser) – Six Afghan private security guards were beheaded during a bank robbery in northern Afghanistan, police said today. An unknown number of robbers raided a Kabul Bank in Balkh province, making off with $269,000 in US and Afghan currency. It appeared the guards had been poisoned beforehand, with someone slipping the poison into their food last night, a police spokesman said. Kabul Bank officials declined to comment. Meanwhile, insurgents wearing suicide vests tried to storm Kandahar Air Field, NATO's largest base in the south, but did not breach its defenses, officials said. The assault started shortly before midday today, with two rockets fired into the base. Then a handful of would-be suicide bombers assaulted the outer gates, but they died before getting far. "They either detonated themselves or were killed," a NATO spokesman said. No NATO personnel were harmed.