The death toll on Wednesday rose to four as Israeli airstrikes on central Gaza killed three people, among them an elderly woman, a health ministry spokesman said.

Ashraf al-Qidra said 60-year-old Abd al-Nasser Abu Kweik and his 31-year-old son Khaled were killed in a strike on Nuseirat refugee camp.

Additionally, an airstrike hit al-Mughraqa village in central Gaza, killing 80-year-old Nayfa Farajallah.

The lethal strikes brought the death toll for Israel’s latest air offensive on Gaza up to 28, most of them civilians.

Earlier, a Palestinian man was killed and another was injured by an Israeli airstrike on a motorcycle in the northern Gaza Strip.

Al-Qidra said 30-year-old Rafiq al-Kafarna was killed as Israeli warplanes targeted his motorcycle in Beit Lahiya.

Another man sustained critical injuries and was taken to Kamal Udwan Hospital, al-Qidra said.

An Israeli army statement said earlier that the air force carried out strikes on some 160 targets in the Gaza Strip overnight.

Israeli airstrikes killed 24 Palestinians, most of them civilians, on Tuesday in Gaza. The strikes have also injured over 100.

Israel has dubbed its air campaign on Gaza “Operation Protective Edge,” saying the offensive comes in response to heavy rocket fire from Gaza’s militant groups.