Nato troops die in Afghan blast

Four foreign soldiers with Nato-led forces have been killed in a bomb blast in the northern Afghan town of Kunduz, Nato and Afghan officials have said. Local Afghan officials said the four victims were American nationals but this was not immediately confirmed by the US military. Earlier, at least two people were killed in a suicide bombing near a Nato base in southern Afghanistan. The attacker blew up his vehicle at a checkpoint outside Kandahar airfield.