A rocket fired from the Gaza Strip on Saturday hit an industrial zone in Sderot in southern Israel, setting a building on fire but without causing casualties, police said. Spokesman Micky Rosenfeld told AFP a second rocket struck open ground. A military spokesman said the building hit was a factory, and that firemen were on the scene. Saturday's attack came a day after two Palestinians in the Gaza Strip were killed in an Israeli air raid after a bomb exploded near troops manning Israel's security fence.