GAZA CITY, Gaza Strip, June 01, SPA -- Palestinian officials sayThree Palestinians have been killed in an Israeli attack in the northern Gaza Strip. Health officials say four people were also wounded inseparate Israeli attacks. The Israeli army says it carried out two attacks northeastof Gaza City after Palestinian fighters bombarded southernIsrael with 20 mortar shells. Gaza's ruling Hamas group claimed responsibilityfor the mortar fire and confirmed three of its members werekilled, the Associated Press reported.--SPA www.spa.gov.sa/563972