The new month was opened by the Germans with another intensive artillery bombardment of the Uxkull bridgehead. Farther to the south, before Dvinsk, and also at many points in the Lake district to the south of this fortress, the Russian positions likewise were raked by violent gunfire. An attempted offensive movement on the extreme northern end of the line before Raggazem, on the Gulf of Riga, broke down before the Russian gunfire, even before it was fully developed. German naval airships successfully bombarded Russian military depots at Perman, while another squadron of sea planes inflicted considerable damage to the Russian aerodrome at Papenholm. A Russian squadron was less successful in an attack on the German naval establishment at Vindau on the east shore of the Baltic Sea. May 2, 1916, brought a continuation of artillery activity at many points. It was especially intensive in the Jacobstadt and Dvinsk sectors of the Dvina front, as well as in the Ziriu-Baranovitchy sector in the south and along the Oginski Canal, still farther to the south. At two other points the Germans, after extensive artillery preparation, attempted to launch infantry attacks, but were promptly driven back. This occurred near the village of Antony, ten miles northwest of Postavy, where two successive attacks failed, and farther north in the region east of Vidzy. The following day again was devoted to artillery duels at many points. Aeroplanes, also, became more active. German planes bombarded many places south of Dvinsk, and attacked the railway establishments at Molodetchna, on the Vilna-Minsk railway, at Minsk, and at Luniniets, in the Pripet Marshes, east of Pinsk on the Pinsk-Gomel railway. May 4, 1916, brought especially intensive artillery fire along the entire Dvina front, in the Krevo sector south of the Vilna-Minsk railway, and along the Oginski Canal, particularly in the region of Valistchie. The Dvina front along its entire length was once more the subject of a violent artillery attack from German batteries on May 5, 1916. Uxkull, so many times before the aim of the German fire, again received special attention. The Friedrichstadt sector, too, came in for its share. All along this front aeroplanes not only guided the gunfire, but supported it extensively by dropping bombs. Between Jacobstadt and Dvinsk a Russian battery succeeded in reaching a German munition depot and with one well-placed hit caused havoc among men and munitions. Southeast of Lake Med a surprise attack, carried out by comparatively small Russian forces, resulted in the capture of some German trenches. Northwest of Krochin strong German forces, after artillery preparation lasting over three hours, attacked the village of Dubrovka. Some ground was gained, only to be lost again shortly after as a result of a ferocious counterattack made by Russian reenforcements which had been brought up quickly.