On April 1, 1916, a German attack against the bridgehead at Uxkull was repulsed by Russian artillery. Farther south, in the Dvinsk sector German positions were subjected to strong artillery bombardment at many points, especially at Mechkele, and just north of Vidzy. On the following day, April 2, 1916, fighting again took place in the Uxkull region. Mines were exploded near Novo Selki, south of Krevo, a town just south of the Viliya River. The Germans launched an attack north of the Baranovitchy railway station. This is the strategically important village through which both the Vilna-Rovno and the Minsk-Brest-Litovsk railways pass and around which a great deal of fighting had taken place in the past. Even though this attack was extensively supported by aeroplanes, which bombarded a number of railway stations on that part of the Minsk-Baranovitchy railway which was in the hands of the Russians, it was repulsed by the Russians. April 3, 1916, brought a renewal of the German attacks against the Uxkull bridgehead. For over an hour and a half artillery of both heavy and light caliber prepared the way for this attack. But again the Russian lines held and the Germans had to desist. Before Dvinsk and to the south of the fortress artillery duels inflicted considerable damage without affecting the positions on either side. Just north of the Oginski Canal German troops crossed the Shara River and attacked the Russian positions west of the Vilna-Rovno railway, without being able to gain ground. All along the line aircraft were busily engaged in reconnoitering and in dropping bombs on railway stations. The bombardment of the Uxkull region was again taken up on April 4, 1916, by the German artillery. South of Dvinsk, before the village of Malogolska, the German troops had to evacuate their first-line of trenches when the arising floods of neighboring rivers inundated them. German aeroplanes bombarded the town of Luchonitchy on the Vilna-Rovno railway, just southeast of Baranovitchy. By April 5, 1916, the German artillery fire before Uxkull had spread to Riga and Jacobstadt, as well as to many points in the Dvinsk sector. Floods were still rising everywhere and the ice on the Dvina began to break up. Again on April 7, 1916, the German guns thundered against the Russian front from Riga down to Dvinsk. Lake Narotch, where so many battles had already been fought, again was the scene of a Russian attack which resulted in the gain of a few advanced German positions. The next day the Germans promptly replied with a determined artillery attack which regained for their side some of the points lost the previous day. Artillery duels also were staged near Postavy, in the Jacobstadt sector, and at the northernmost end of the line where the German guns bombarded the city of Schlock.