JERUSALEM, March 28 (Xinhua) -- Two Israelis were killed in a big explosion in southern Israel on Tuesday, sources said.

   Earlier, the sources said that the two Israeli Bedouin shepherds were wounded in a Palestinian militant rocket attack.

   An investigation into the incident, which occurred near the border community of Nahal Oz, was currently underway and the police suspected that a rocket fired by Palestinian militants from the northern Gaza Strip might cause the blast.

   The deadly explosion came as Israelis were heading to the polls in a key parliamentary ballot. Enditem