Islamabad, Rabi Al-Akhir 22, 1432, March 27, 2011, SPA -- Four persons were killed and a number of others wounded in a rocket attack launched by unknown gunmen this morning at a car in Kurram tribal district of northwest Pakistan. The security sources said that the attack occurred in Shaheed Nawaz Province when the unidentified gunmen fired rocket-propelled grenades at a car that was traveling in the province, leading to the destruction of the car and causing deaths and injuries. The security sources said among the dead was a woman, adding that it was not clear what prompted the gunmen to engage in this attack that came at a time when Kurram district is witnessing sectarian clashes. --SPA 14:09 LOCAL TIME 11:09 GMT www.spa.gov.sa/877821