Two Palestinians were killed in an Israel air strike in fighting in Gaza as fighting continued, a Gaza health official said.
Ashraf al Kidra said the victims were workers at a livestock farm which was hit in the attack.
The Israeli military said it carried out 20 air strikes early today, targeting rocket launchers and weapons sites. It said Gaza militants fired two rockets at Israel.
Earlier this week, Hamas rejected a ceasefire proposal saying they would not accept anything short of an end to the blockade.