Hezbollah chief Nasrallah vows 'retribution' after Lebanon blasts

Hezbollah chief Hassan Nasrallah said in his televised speech on Thursday that his group will respond to the explosions of thousands of pagers and walkie-talkies. 

Nasrallah said his group would respond with "fair retribution" and that "punishment is under way" after blaming Israel for the twin attacks carried out on Tuesday and Wednesday.