At least one Palestinian has been killed in clashes with Israeli troops in the Gaza Strip. Three others have been seriously injured.
The Islamic Jihad militant group told journalists that
Israeli tanks fired shells and a helicopter launched a missile at its men.
The Israeli Army says it opened fire after spotting militants planting explosives along the security fence with Gaza.
The confrontation took place east of the al-Bureij refugee camp in central Gaza.
It is the first fatal shooting in the Hamas-controlled territory since three Palestinian gunmen and two Israeli soldiers were killed more than two weeks ago.
The incident has undermined the fragile ceasfire which has existed between Hamas and Israel since the Gaza offensive in January 2009.
Palestinian militant killed in Gaza