Three Palestinians were spotted crawling towards the Gaza border fence in the early hours of Friday morning before they threw a pipe bomb at soldiers patrolling the area, according to the Israel Defense Forces. The troops, who were not hit by the bomb and sustained no injuries, responded by firing at the Palestinians, the army said in a statement. There were no reports of Palestinian injuries. Earlier Thursday, the army said it detonated a large bomb that had been placed along the Gaza security fence by Palestinians during a recent riot.