A string of bombings and gunbattles reported around Afghanistan killed 41 people and left at least six wounded, including two foreigners hurt in a suicide bombing near the capital. Insurgent violence is running at its highest level since US forces invaded the country in 2001 to oust the hard-line Islamic Taliban rulers, who had harbored al-Qaida leaders following the Sept. 11 attacks. Most of the violence is concentrated in southern or eastern Afghanistan, where insurgents staged several attacks Saturday, but there have been occasional suicide attacks on Afghan security forces and foreign targets in Kabul. A suicide car bomber rammed his vehicle into a convoy of two four-wheel drive Land Cruisers on a main road leading out of the capital Saturday, said Ali Shah Paktaiwal, chief of criminal investigations in the city. Interior Ministry spokesman Zemerai Bashary said two foreigners and four Afghans were injured. He said he did not know the nationalities of the foreigners or the extent of their injuries.