Palestinian media said the Israeli strikes fell on agricultural land in Gaza on Saturday, but the Israeli military said it targeted military sites belonging to Hamas, the Palestinian group which rules the enclave.
The air attack comes a day after Israel launched military raids on Jenin in the occupied West Bank in which three Palestinians were killed and 10 were wounded. Also on Friday, an Israeli observation balloon crashed and fell in the northern Gaza Strip.
Palestinian news agency Wafa named the men killed in Jenin as Baraa Lahlouh, 24, Yusuf Salah, 23, and Laith Abu Suroor, 24.
Hamas said one of those killed was among its members, while another group that draws on members of Palestinian faction Islamic Jihad claimed the dead men as its own.
Although Saturday’s cross-border fire did not appear to signal a wider escalation, violence has risen in Jerusalem, the occupied West Bank and Israel in recent months.
According to the Palestinian health ministry, more than 60 Palestinians have been killed by Israeli forces this year, many of them in raids. A string of Palestinian attacks since March has also killed 19 people in Israel.
Al Jazeera journalist Shireen Abu Akleh was killed by Israeli forces last month in Jenin while she was covering an Israeli army operation. She was wearing a flak jacket marked with the word “PRESS” when she was shot dead.
In May 2021 Israel launched an 11-day assault on the besieged Gaza Strip. Israeli air and artillery attacks killed 253 Palestinians, including 66 children, and left more than 1,900 people wounded. Two children were among 12 people killed in Israel by rockets fired by Hamas and other armed groups from Gaza during the same period.
US-brokered peace talks aiming to establish a Palestinian state in east Jerusalem, the West Bank and Gaza collapsed in 2014 and there is no sign of their revival.
US President Joe Biden is expected to meet Israeli and Palestinian leaders during a visit to the region in July.