Six mortar shells were fired at Israel from the Gaza Strip on Wednesday, but landed in Palestinian territory and injured six Gazans, according to Palestinian sources.

The mortar shells were aimed toward the Eshkol region of the western Negev, but landed in on Palestinian land, one of them hitting a house in the northern Gaza Strip town of Beit Hanoun, sending shrapnel flying and lighting a small fire inside.

Six Palestinians were injured, one of them seriously, Gaza emergency services chief Mo'aweya Hassanein said.

The shells were fired just two days after the Islamic Jihad in Gaza announced that it would cease firing rockets into Israel.

Earlier in the week on Sunday night, Gaza militants fired a Qassam into Israel, which hit an open area in the northwestern Negev area. There were no casualties and no damage was done. The attack came after Hamas said they would try to reduce rocket attacks against Israel.

Hamas spokesman Ayman Taha on Friday told the BBC that Hamas is working to curb rocket attacks against Israel by Gaza militants.

"The government in Gaza is in charge of the situation, and it does know clearly who launches rockets," Taha told the BBC. "It is working hard to deter any faction from acting individually."