Two rockets were fired from northern Gaza into the Mediterranean Sea on Sunday morning.

Israel believed the fire was likely a test of the rocket systems, the Walla news site reported.

They were fired by the Izz ad-Din al-Qassam Brigades, the military branch of the Hamas group that rules the Gaza Strip.

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A rocket was fired from Gaza into the sea last week in another apparent test.

In last summer’s war between Israel and Hamas, Palestinian groups fired almost 5,000 rockets and over 1,500 mortar shells toward Israeli towns and villages. The Israel Defense Forces said at the time that the 50-day conflict had depleted as much as 80% of Hamas’s rocket stockpiles, but the group is believed to be working to rebuild its arsenal.