Photo taken on May 11, 2014 shows a damaged makeshift house at the accident site in Huangdao Island, east China's Shandong Province. Eighteen people were killed and another three injured early Sunday morning after a rainstorm-triggered earth-retaining wall collapsed here, said local authorities. The wall collapsed and fell onto a makeshift house at a processing site of a Shandong renewable resource company. (Xinhua/Lin Xiaomu) (mp)

Eighteen people were killed and another three injured early Sunday morning after a rainstorm-triggered wall collapse in Qingdao in east China's Shandong Province, said local authorities.

At 5:48 a.m. Sunday, an earth-retaining wall collapsed and fell onto a makeshift house for staff at a processing site of a Shandong renewable resource company at Huangdao Island, said the press office with the Qingdao city government.

The wall collapsed due to waterlogging after a rainstorm.

Rescuers soon rushed to the site and conducted a search.

As of Sunday noon, rescue work had finished. Three injured people have been sent to receive medical treatment.

Investigation into the incident is under way.