Medics named the girl as Hala Abu Sabikha from the central Gaza Strip, noting "three other members of her family were wounded."
Emergency services spokesman Ashraf al-Qudra said six people had been wounded in a series of strikes
Witnesses said a training center of the Hamas movement near Khan Younis in the south of the strip was struck.
Hamas evacuated offices and training grounds and Israel ordered farmers to stay clear of the border with Gaza.
The Palestinians were alarmed after an Israeli troop was reportedly killed in a shooting incident near Gaza.
Israeli regime has been widely condemned for use of excessive force in reaction to protest moves by Palestinians, especially in Gaza which is crippling to survive under a strict Israeli-imposed siege.
Many Palestinians have lost their lives in attacks by the Israeli forces which regime authorities call’ retaliation’ to mostly stone hurling by unarmed Palestinians.
On Sunday, the Palestinian Centre for Human Rights expressed deep concern over Israeli use of excessive force after regime troops shot dead a 27-year-old man and wounded his brother in north of Gaza as they were picking up scrap in a wasteland.
SHI/SHI