The most determined resistance occurred outside the Diệu Đế Pagoda in Huế. As troops attempted to erect a barricade across the bridge leading to the pagoda, the crowd fought the heavily armed military personnel with rocks, sticks and their bare fists, throwing back the tear gas grenades that were aimed at them. After a five-hour battle, the military finally took the bridge at dawn by driving armored cars through the angry crowd. The defense of the bridge and Diệu Đế left an estimated 30 dead and 200 wounded. Ten truckloads of bridge defenders were taken to jail and an estimated 500 people were arrested in the city. Seventeen of the 47 professors at Huế University, who had resigned earlier in the week in protest after the firing of the school's rector, Father Cao Văn Luân, a Catholic priest and opponent of Diệm's brother Archbishop Pierre Martin Ngô Đình Thục, were also arrested. Despite his vigorous application of Diệm's military policies against Buddhists in central Vietnam, where in the words of Ellen Hammer, Trí "ruled...with an iron hand", he was still involved in plotting against the regime even before the attacks on the pagodas.