Israeli forces killed two Hamas members in air strikes on Gaza on Friday, and one Palestinian protester was killed by Israeli fire along the enclave's border.
Hamas, the group that rules the Palestinian enclave, said two members of its armed wing had been killed and three wounded when Israel bombed one of its positions in central Gaza.
Shortly afterwards, a 19-year-old Palestinian shot by Israeli troops while taking part in weekly protests along the border died of his wounds, Gaza medical officials said.
Fifty other Palestinians, including 12 children, three paramedics and a journalist, were injured, the Health Ministry said.
The strikes occurred following reports that two Israeli soldiers had been injured by gunfire near the Gaza-Israel buffer zone.
"A military force came under fire near the security fence between Israel and the southern Gaza Strip," Israeli army spokesman Avichai Adraee tweeted.
Two soldiers were injured in the attack near the buffer zone, Adraee added.
Shortly afterward, Israeli warplanes struck several Hamas positions in Gaza, while farmland in the central Gaza Strip came under Israeli tank-fire, according to witnesses.
According to the Health Ministry, more than 270 Palestinians have been killed and thousands injured in protests at the border since March last year.
