13-year-old boy killed in Gaza airstrike, Palestinians say

Gaza City (CNN) -- An Israeli airstrike killed a 13-year-old boy in Gaza on Sunday, Palestinian medical sources said, bringing the number of dead there to 17 in three days of strikes.

At least 35 have been injured in the attacks, which Israel says are a response to dozens of rocket attacks from Gaza into Israel.

Palestinians named Sunday's victim as Ayuub Assilla and said he was the second victim who was not a militant.

He was killed near the Jabalia refugee camp, north of Gaza city.

On Saturday, a 51-year old man was killed on the back of a motorcycle.

Israel's foreign minister, Avigdor Lieberman, said Israel makes its "best effort to target terrorists and not the civilian population," but added: "We will not accept the constant disruption of life in the south of Israel and I advise all heads of terror to think well about their actions.

He blamed Hamas, the Palestinian Islamist movement that runs Gaza, and Palestinian Authority President Mahmoud Abbas for the violence. Read More