Jerusalem (CNN) — One person was killed and at least 12 were injured Saturday when more than two dozen rockets fired by Gaza militants slammed into Israeli cites.

It’s the latest in the ongoing tit-for-tat violence between Israel and militants over the past three days.

The fatality occurred in Beer Sheva, according to Eli Bin, an emergency official in the region. Four people were seriously injured and two suffered moderate wounds when rockets struck a house and car. An unknown number of trauma injuries were being transported to the hospital, Bin said.

Hamas militants in Gaza claimed responsibility for a volley of rockets that struck Ofakim, 25 kilometers west of Beer Sheva.

Two children and a man were injured when one of the rockets directly hit a building, Bin said.

Hamas’ armed wing, the Izzedine al Qassam Brigades, said it fired four long-range Grad rockets at Ofakim.

A long-range missile struck the Israeli port city of Ashdod, injuring three people, authorities said.

The attacks followed overnight airstrikes that targeted what Israeli security officials said were militant sites in Gaza.

Earlier in the day, Hamas announced it was ending a two-year truce with Israel.