Palestinian medics on Tuesday said dozens of people have died in fresh Israeli attacks on the southern Gaza city of Rafah, two days after 45 people were reportedly killed in an airstrike which sparked international condemnation. The Israeli military said it was investigating reports of an attack on a shelter for displaced persons in western Rafah. Hamas authorities said the attack featured at least four grenades, with unconfirmed estimates putting the death toll at more than 20. Earlier on Tuesday, a spokesman for the Hamas-run health authority in Gaza said a further 18 people were killed over…