Palestinian hospital officials said the five were activists.? The Hamas Islamist group, which rules the Gaza Strip, says it has tried to curb rocket fire at Israel, but smaller groups continue to carry out such attacks.? They identified the five dead as members of the Islamic Jihad and Popular Resistance Committees.? Israel's military said more than 200 cross-border missiles, rockets and mortars have been fired from Gaza this year.

Meanwhile, a Palestinian teenager fishing off the coast of the Gaza Strip on Friday drowned following firing by the Israel navy, a health official and witnesses said.

?"Adolescent Zyad El-Bardawil, 15, died after Israelis pursued his boat at sea," a spokesman for Gaza's health services, Adham Abu Selmiya, said.?

According to witnesses, the Israeli Navy opened fire on fishing boats off the coast of Rafah when one of the boats overturned and the teenager drowned.?The boy's boat was part of a small flotilla of fishing boats that was pursued by a navy patrol boat, the witnesses said. ?Fishing zones are strictly limited off Gaza by Israel that has imposed a blockade of the Gaza Strip controlled by the Hamas movement.