President Hamid Karzai on Saturday said that a long-delayed deal on the future of US forces in Afghanistan was close to completion but differences remained after talks with US Secretary of State John Kerry. \"After several months of negotiation, and intense talks yesterday and today, we have reached a series of agreements,\" Karzai told reporters in Kabul. \"The BSA (Bilateral Security Agreement) has a lot of items, one is about immunity for foreign and US soldiers -- we didn\'t have a united opinion on this issue.\"