An alley in Itaewon is cordoned off with yellow tape,Oct. 30, a day after a deadly stampede in the popular nightlife district killed more than 150 people and injured scores of others during Halloween celebrations. Yonhap

Social media and online portal operators in South Korea urged users Sunday to refrain from spreading disturbing video footage or ungrounded information about the deadly stampede at Itaewon that killed over 150 people.

Kakao, the operator of No. 1 online messenger KakaoTalk, made the call in a notice to users, asking them to act with caution when sharing or writing things about the Itaewon accident.

"We ask you to refrain as much as possible from uploading photos or videos that reveal the identities of the victims, and disseminating or sharing unconfirmed facts related to the accident," Kakao said.

A store in Itaewon is closed, Oct. 30, one day after a stampede in the entertainment district in downtown Seoul left more than 150 people dead. Yonhap