KABUL (Reuters) - Afghan security forces have detained seven accused insurgents in the capital of Kabul who planned to assassinate the vice-president and attack the citys presidential palace, officials said on Wednesday. Lutfullah Mashal, spokesman for the National Directorate of Security, said five of the militants had been planning to attack the residence of Mohammad Qasim Fahim, President Hamid Karzais first vice-president. The individuals were close to carrying out suicide bombings and an assault against the vice-president when detained some 20 days ago, Mashal told reporters in Kabul. Mashal said the other two insurgents, from the Al-Qaeda-linked Haqqani network, planned to attack the heavily guarded presidential palace and other locations in Kabul. Haqqani is accused of being responsible for several attacks in Kabul, including suicide bombings at the Indian embassy in 2008 and 2009 and at Afghan ministry buildings, which killed and wounded scores of people. Kabul has been relatively peaceful in the past six months, and there have been few attacks since a ring of steel was erected in the city before the countrys parliamentary elections in September. Foreign military and civilian casualties are at record levels despite the presence of about 150,000 Nato-led troops, with 2010 the bloodiest year on record since the Taliban were ousted by US-backed Afghan forces in late 2001. Nato leaders agreed at a summit in Lisbon in November to end combat operations and hand security responsibility to Afghan forces by the end of 2014. US President Barrack Obama has promised to begin withdrawing US troops from July this year.