There is but one proper response to terrorists, unleash Hell!
And Haaretz is reporting that ISIS-affiliates have taken responsibility for the rocket attacks:
A rocket fired from the Gaza Strip at the southern Israel city of Ashdod on Tuesday night was intercepted by the Iron Defense air defense system. No damage or casualties were caused.
The Grad-type rocket was the first rocket to be fired from the Strip at Ashdod since the summer conflict between Gaza and Israel ended in August 2014.
The radical Salafist group the Omar Hadid Brigade, which is affiliated with ISIS, claimed responsibility for the attack, despite initial assessments that it was the Islamic Jihad that launched the attack.