Militant Palestinian groups in Gaza reject a claim that an agreement has been reached for a ceasefire with Israel.

Earlier, Palestinian officials said rocket attacks against Israel would stop beginning at midnight, Saturday, in an attempt to bring an end to the blistering Israeli offensive that began June 28.

The Israelis began the attacks three days after Palestinian militants staged a raid on a military outpost near the border.

The militants killed two soldiers in the raid and captured a third.

Since then, the Israelis have waged an intense campaign to recover the abducted 19-year-old, Cpl. Gilad Shalit.

Speaking on the condition of anonymity, a Palestinian official told The Associated Press the ceasefire is aimed at ending the ongoing offensive that has claimed the lives of more than 100 Palestinians.

The meetings involved Palestinian Authority President Mahmoud Abbas and Prime Minister Ismail Haniyeh.

However, Al Aqsa Martyrs' Brigades, Islamic Jihad and the Hamas military wing -- the three groups who claimed responsibility for capturing Shalit -- denied they had agreed to a ceasefire.

They say the rocket attacks are in response to Israeli aggression.

The Israeli military has staged daily attacks using warplanes, tanks and artillery.

Meanwhile, Palestinian militants have fired an almost constant barrage of homemade rockets into Israel.

The Israelis haven't commented on the unilateral ceasefire except to say it would wait to see what happens; however, there was no fighting between Israeli troops and Palestinians in Gaza on Saturday.

As recently as Friday, four people were killed in Gaza City when -- according to reports -- an Israeli tank shell struck a home.

The victims included a Hamas activist and three of his relatives.

However, the Israelis denied using artillery or tanks.

One day earlier, on Thursday, two militants were killed and 15 people -- many of them civilians -- were wounded when Israel carried out strikes on Palestinian militants against refugee camps in central Gaza.

With files from the Associated Press