At least 25 Palestinians have been killed in four Israeli air strikes in a part of the Gaza Strip under Hamas control since a shaky ceasefire took effect in October, health authorities say.

Medics said 10 people were killed in the Gaza City suburb of Zeitoun, two in Shejaia suburb to the east and the rest in two separate attacks in Khan Younis in the south of the Gaza Strip.

The Israeli military said its forces struck Hamas targets across the strip after members of the Palestinian militant group fired on its troops in violation of the nearly six-week-old ceasefire.

No Israeli forces were injured.

Repeated shooting incidents have pointed to the fragility of the ceasefire.

Israel and Hamas have traded blame for what both call violations of the US-brokered truce, the first stage of Presi

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