Roadside blast kills 6 Afghan security guards escorting NATO convoy

Police say a roadside blast has killed six Afghan private security guards escorting a supply convoy for NATO-led troops in southern Afghanistan. Provincial police Chief Mohammad Hussein Andiwal says two other guards were wounded in the attack Sunday in Gereshk district of Helmand province. Insurgents regularly attack NATO and US military supply convoys in the country. More than 2,300 people - mostly militants - have died in insurgency-related violence this year, according to an Associated Press tally of official figures.