Questions raised on Halloween crush in South Korea

South Korea was in mourning on Monday after more than 150 people died in a nightlife district in Seoul

People paid a small tribute outside Itawan Metro Station on Monday morning

President Yoon Suk-yol has declared national mourning

Most of the shops and cafes around the site of the incident were closed and the police cordoned off the incident

South Korean Prime Minister Han Dak-soo promises to probe into disaster as people seek answers 

At least 100,000 people were wearing Halloween costumes

About 98 of those killed were women and 149 people were injured.

More than 80% of the dead were in their 20s and 30s, and at least four were teenagers