About 200 South Koreans turned out for a vigil Wednesday evening in Seoul, to commemorate the deaths of two marines and two civilians killed last month. The four were killed during a strike by the DPRK on the Southern Korean island of Yeonpyeong.

The crowd held silent prayers and placed flowers on a memorial shrine during the candlelight vigil. The vigil came as South Korea vowed to "punish the enemy" if the North strikes again. South Korea is in the midst of a military drill involving hundreds of troops, fighter jets, tanks and attack helicopters. The exercise comes amid high tensions on the Korean peninsula.