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German bombardments continued during the night of 4/5 March, before an attack on the British right flank, which captured a trench block and about 100 yards (91 m) of Fritz Trench to the north, before a local counter-attack recovered the recaptured ground. German artillery-fire continued all day and at 7:30 p.m., German infantry seen massing on the right flank, were dispersed by SOS artillery and machine-gun barrages before they could attack; German bombardments continued on 6 March, before slowly diminishing. The operation cost the British 1,137 casualties, 217 German prisoners and seven machine-guns were captured and "exceedingly heavy" German casualties inflicted, according to surveys of the vicinity, after the German withdrawal to the Hindenburg Line (Siegfriedstellung).