Israeli army planes launched a strike at a "terror-affiliated site" in the southern Gaza Strip Saturday, December 10, the military said, after 12 rockets were fired from Gaza at Israel the previous day.

A statement from the military said direct hits were confirmed in the air strike. Gaza medics reported no casualties from the attack, which was at a Kassam training camp, AFP reports.

On Friday, a Palestinian father and his 12-year-old son were killed and 10 other civilians hurt in an Israeli air raid at a militant training ground that caused a nearby house to collapse. Following the Israeli attack, Gaza militants fired 12 rockets at southern Israel. None of the rockets caused casualties or damage.

The Israeli army expressed regret that civilians were hurt but blamed Gaza's Hamas rulers for operating within residential areas. It said the Friday strikes were in response to five rockets fired Thursday night on southern Israel, none of which had caused casualties or damage.

The rockets were in turn retaliation for an Israeli air raid earlier in the day that had targeted a car in Gaza City, killing two militants and wounding another four people.

Israel frequently targets militants it says are about to fire rockets over the border, or attacks Gaza in response to such rocket fire. It also carries out targeted attacks against specific militants.