JERUSALEM, Israel - A 12-year-old Israeli girl sustained a serious head injury when Palestinians pelted her family's car with rocks.

After treating her at the scene, Magen David Adom paramedics rushed her to Schneider Children's Hospital in Petah Tikvah, where she is in moderate condition.

The third terror attack in as many days took place near the city of Ariel in Samaria.

Her parents, residents of the Israeli community of Har Bracha, were driving in the area when the rock attack took place.

Her father continued to Tapuach Junction where the IDF troops came to their aid.

A larger-than-normal contingency of troops has been deployed to the area following drive-by shootings on Tuesday and Wednesday night.

On Tuesday night, Palestinians shot four Israelis to death. On Wednesday, two Israelis escaped serious injury when one of their assailant's rifles jammed, allowing them time to escape down an embankment and call for help.

Hamas, which claimed responsibility for the shooting attacks, has promised to launch "more effective attacks" against Israel, according to Reuters.

"All options are opened" a Hamas spokesman said, when asked if the group would renew suicide bombings against Israelis.

Gaza-based Hamas chief Ismail Haniyeh and senior Hamas official Mahmoud al-Zahar said the Palestinians would not recognize an agreement signed by PA President Mahmoud Abbas, who does not have a mandate to negotiate on their behalf.