By Bassam Masoud and Nidal al-Mughrabi GAZA/DOHA (Reuters) – The United States on Monday called for Israel to protect innocent people in hospitals, medical staff and patients as Israeli forces stormed one hospital and put another under siege as they advanced deep into western Khan Younis in Gaza. Residents said the bombardment from air, land and sea was the most intense in southern Gaza since the war began in October. Troops moved for the first time into Al-Mawasi district near the Mediterranean coast, west of Khan Younis, the main city in southern Gaza. There, they stormed Al-Khair hospital a…