A commander of the Palestinian Islamic Jihad faction is dead after an Israeli strike in the Gaza Strip.
Four other militants are also reported to have been killed.
The strike in Rafah came after Palestinian rockets were fired into Israel on Thursday, without causing any injuries.
Abu Ahmed, an Islamic Jihad spokesman said: “We in the military wing of Islamic Jihad will take action after this violation. We will take revenge in a way that the enemy will understand. We are not speaking about a ceasefire, we’re speaking about defence. Our act will be as strong as the crime that took place today.”
An Islamic Jihad training camp was targeted.
The Israeli military has confirmed an attack took place, but did not give any precise details.