IDF gunfire wounded four Palestinians in the Gaza Strip on Thursday, medics said, in an incident that ruptured the calm of a shaky truce achieve after a spasm of cross-border violence earlier this month.The IDF spokesperson said that forces operating along the Gaza border fired on a terrorist unit that appeared to be attempting to place an explosive device along the fence. Apparently, the spokesperson said, uninvolved civilians were hit in the strike.RELATED:'Egypt to permanently open Rafah border crossing'3 UNRWA workers injured from Gaza projectile fire console.log("catid body is "+catID);if(catID==120){document.getElementsByClassName("divConnatix")[0].style.display ="none";var script = document.createElement('script'); script.src = 'https://player.anyclip.com/anyclip-widget/lre-widget/prod/v1/src/lre.js'; script.setAttribute('pubname','jpostcom'); script.setAttribute('widgetname','0011r00001lcD1i_12258'); document.getElementsByClassName('divAnyClip')[0].appendChild(script);}else if(catID!=69 && catID!=2){ document.getElementsByClassName("divConnatix")[0].style.display ="none"; var script = document.createElement('script'); script.src = 'https://static.vidazoo.com/basev/vwpt.js'; script.setAttribute('data-widget-id','60fd6becf6393400049e6535'); document.getElementsByClassName('divVidazoo')[0].appendChild(script); }The IDF statement added that it was forced to respond to terrorists operating near civilian population centers.Officials in the Strip said IDF soldiers had fired in the direction of a home in central Gaza after darkness fell.Medics said later four people including a woman and two minors had been taken to a hospital with slight injuries.The incident followed a surprise unity deal achieved this week between Hamas and the Fatah movement that dominates in the West Bank.