In the first four days of Russia’s full-on invasion of Ukraine, the Ukrainian side has claimed to have killed thousands of Russian troops and captured more than 200 of Russia’s soldiers since the start of fighting on Feb. 24.

The Russian Defense Ministry has not yet released information on the number of Russian soldiers killed, wounded, or captured since Russian President Vladimir Putin ordered the invasion of Ukraine on Thursday. However, the Ukrainian government has begun posting pictures of captured Russians and has asked their families to identify them.

In a translated Facebook post on Saturday, the Ukrainian military said more than 200 Russian soldiers have been captured. On the first day of fighting, the Ukrainian military announced an entire reconnaissance unit of Russia’s 74th Motor Rifle Brigade had surrendered.