<span style="color: #222222;">Israeli warplanes hit the Gaza Strip's Islamist rulers Hamas today after cross-border mortar fire by Palestinian militants.<br />''  <br />'' The Israeli army in a statement said in Jerusalem that fighter aircraft hit Hamas targets in the northern Gaza Strip. It said, among the targets were weapon storage facilities and an underground infrastructure used by the Hamas. However, there were no reports of casualties.<br />''<br />''The strikes followed successive rounds of cross-border fire from Gaza yesterday and the launch of balloons fitted with incendiary devices into southern Israel.</span>