On 2–3 December, the JNA resumed infantry weapons fire against the Old Town, followed by mortar fire against Fort Imperial on 4 December. The heaviest bombardment of the Old Town started at 5:48 am on 6 December. The Old Town was struck by 48 missiles, 232 and 364 mortar shells, as well as 22 wire-guided missiles. Two impact craters indicated the use of heavier weapons. The bombardment was concentrated on Stradun—the central promenade of the Old Town—and areas north-east of Stradun, while other parts of the Old Town sustained relatively few impacts. The attack subsided at 11:30 am. It killed 13 civiliansthe heaviest loss of civilian life during the siege. The Dubrovnik Inter-University Centre library containing 20,000 volumes was also destroyed in the attack and the Libertas Hotel was bombarded by JNA artillery aiming to kill firefighters putting out fires caused by an attack earlier that day. The 6 December attack of the Old Town was met with strong protests from the international media, UNESCO Director-General Federico Mayor Zaragoza, Special Envoy of the Secretary-General of the United Nations Cyrus Vance and the ECMM on the day of the bombardment. Later that day, the JNA issued a statement of regret and promised an inquiry. On 7 December, representatives of the JNA visited the Old Town to inspect the damage but no further actions were noted.