South Korean celebrities have shared their condolences on social media following the crowd crush that took the lives of more than 150 people in Seoul's Itaewon neighborhood Saturday.

Seven-piece boy band ENHYPHEN — composed of Heeseung, Jay, Jake, Sunghoon, Sunoo, Jungwon and Ni-ki — took to Twitter Monday to share its reaction to the tragedy.

"My heart is heavy with the sad news from Korea," the group said, as per the microblogging site's translation. "We pray for the well-being of the deceased, and we also offer our condolences to the bereaved families and acquaintances who have lost loved ones."

Singer PSY, whose real name is Park Jae-sang, also came up with a post about the tragic accident. "Our thoughts and prayers are with everyone who have been affected by the tragic accident in Itaewon," he said in an Instagram Story, according to Entertainment Tonight.

"We send out deepest condolences to the families who have lost their loved ones and wish for a speedy recovery to those who were injured," the "Gangnam Style" artist added.

Singer Holland, whose real name is Go Tae-seob, shared a black tile on his Instagram feed. "I express my deepest condolences and condolences for the disaster that happened in Itaewon that I love and mean a lot. Condolences to the many who have lost loved ones and friends," the translated version of his post's caption read.

Meanwhile, singer Jang Yoon-jeong announced via Instagram that her upcoming concerts would not push through, noting that South Korean President Yoon Suk-yeol ordered a week-long national mourning period Sunday.

"I thought it would be inappropriate to hold the concert in a situation where the national mourning period was announced and the whole nation was in mourning due to this tragedy," she wrote on her husband Do Kyung-wan's Instagram account, as per Entertainment Tonight.

"I would like to express my apologies to the fans who have been waiting for my performance," she noted further.

The president himself shared a statement Sunday. "As a president responsible for the lives and safety of his people, my heart is heavy and hard to express my sorrow," part of his post read, according to Instagram's translation.

The deadly stampede reportedly occurred when the huge crowd celebrating Halloween moved toward a narrow alley. Most people who died in the incident were under 30.

One of the fatalities was 24-year-old singer-actor Lee Ji-han, who was a contestant in the singing contest "Produce 101" and was part of the cast of the Korean series "Today Was Another Nam Hyun Day."

Reactions after Halloween festival stampede, in Seoul