Rescuers introduce the information of the collapse accident to media near the Banghwa Bridge in Seoul, South Korea, on July 30, 2013. Two Chinese workers were killed as a section of an under-construction ramp onto Banghwa Bridge collapsed Tuesday, according to Yonhap. (Xinhua/Yao Qilin)

Rescuers work at the collapse site near the Banghwa Bridge in Seoul, South Korea, on July 30, 2013. Two Chinese workers were killed as a section of an under-construction ramp onto Banghwa Bridge collapsed Tuesday, according to Yonhap. (Xinhua/Yao Qilin)

Rescuers work at the collapse site near the Banghwa Bridge in Seoul, South Korea, on July 30, 2013. Two Chinese workers were killed as a section of an under-construction ramp onto Banghwa Bridge collapsed Tuesday, according to Yonhap. (Xinhua/Yao Qilin)

Photo taken on July 30, 2013 shows the collapse site near the Banghwa Bridge in Seoul, South Korea. Two Chinese workers were killed as a section of an under-construction ramp onto Banghwa Bridge collapsed Tuesday, according to Yonhap. (Xinhua/Yao Qilin)

Rescuers work at the collapse site near the Banghwa Bridge in Seoul, South Korea, on July 30, 2013. Two Chinese workers were killed as a section of an under-construction ramp onto Banghwa Bridge collapsed Tuesday, according to Yonhap. (Xinhua/Yao Qilin)

Photo taken on July 30, 2013 shows the collapse site near the Banghwa Bridge in Seoul, South Korea. Two Chinese workers were killed as a section of an under-construction ramp onto Banghwa Bridge collapsed Tuesday, according to Yonhap. (Xinhua/Yao Qilin)

Photo taken on July 30, 2013 shows the collapse site near the Banghwa Bridge in Seoul, South Korea. Two Chinese workers were killed as a section of an under-construction ramp onto Banghwa Bridge collapsed Tuesday, according to Yonhap. (Xinhua/Yao Qilin)