Israeli forces attack an Islamic Jihad camp in the southern Gaza Strip Saturday killing a commander of the Palestinian faction and four other militants.
Islamic Jihad said an explosion in the training camp killed Ahmed al-Sheikh Khalil, a munitions expert.
The strike in Rafah, a town on Gaza's border with Egypt, followed a Palestinian rocket salvo on Thursday which landed deep in Israel but caused no casualties.
Islamic Jihad spokesman Abu Ahmed is vowing revenge against Israel.
SOUNDBITE: Islamic Jihad spokesman Abu Ahmed, saying (Arabic):
"We in the military wing of Islamic Jihad will act toward this violation. We will take revenge in a way that the enemy will understand. We are not speaking about ceasefire, we are speaking about defending. Our act will be as strong as the crime that happened today,"
Islamic Jihad, a sometime ally of Gaza's ruling Hamas, has chafed at recent efforts by the more powerful faction to impose de facto ceasefires with Israel.
Deborah Lutterbeck, Reuters