Israel has continued its air strikes and shootings in Gaza, raising fears over the future of its fragile ceasefire deal with Hamas, as United States envoys ramp up diplomacy to get the deal back on track.The Palestinian Civil Defence agency said that four people were killed in two separate attacks, both times “by Israeli gunfire as they were returning to check on their homes” in the al-Shaaf area, east of Tuffah neighbourhood, in eastern Gaza City.Recommended Stories list of 3 itemsend of listIsrael’s military claimed it had fired at militants who crossed the so-called yellow line of demarcation and had approached troops in the Shujayea neighbourhood, which is adjacent to Tuffah, and “posed a threat” to Israeli soldiers.The yellow line, set out in a map shared by US President Donald Trump on October 4, is the boundary behind which Israeli troops pulled back and remain stationed under the ceasefire agreement with Hamas.Gaza City residents reported confusion over the line’s location because of a lack of a visible boundary. “The whole area is in ruins. We saw the maps but we can’t tell where those lines are,” said Samir, 50, who lives in Tuffah in the city’s east.Several outbreaks of violence have taken place sinc …