The Palestinian Red Crescent said one person was killed in a pre-dawn raid by the Israeli army in Nablus.
Israel bombed the Gaza Strip, saying the airstrikes were in response to a rocket fired from the Palestinian territory at the weekend, while one person was reported killed in a military strike in the occupied West Bank.
Several explosions were reported in Gaza early Monday, a Reuters witness told the news agency.
There was currently no information on casualties.
Israel’s military said it struck an underground site “containing raw materials used to manufacture rockets belonging to the terrorist organization Hamas.”
The attacks were “in response to Saturday’s rocket launch from Gaza into Israel,” the army added in a statement.
There have been no claims from any Palestinians about the alleged rocket launch.
The Palestinian Red Crescent, meanwhile, said one person was killed in a pre-dawn Israeli army raid in Nablus in the occupied West Bank, the scene of almost relentless violence over the past year.
The Israeli army did not immediately comment on the attack on Nablus.
Hamas took control of Gaza in 2007.