The defiant statement said scientists have already discovered what caused the rocket to fail barely a minute into its flight last friday . It did not give a time frame for its next rocket launch .
In a defiant statement posted on his website , the moderate leader also called for the release of detained " children of the revolution " a reference to reformist figures arrested since the 12 june poll .
In gaza , mahmoud zahar , the most senior leader of hamas in the strip and a hardliner in the movement , appeared on the party 's al-aqsa television station and gave a defiant speech threatening attacks not only in gaza but elsewhere .
