A huge arch bridge over a bay in Taiwan has collapsed sending an oil tanker truck falling onto boats in the water below.
An air force helicopter, fishing vessels and more than 60 military personnel including divers are searching for possible victims after the dramatic collapse on Tuesday.
Video footage on Twitter shows a large truck almost getting across and then tumbling backwards as the bridge disintegrated into the water.
Interior Minister Hsu Kuo-yung told reporters about five people were feared to have been on the bridge when it collapsed.
Six people are believed trapped on one of the boats below, the National Fire Agency said in a statement.
Ten people have been taken to hospital, six of them with serious injuries.
The 140-metre-long (460-feet) bridge collapsed about 9.30am in Nanfangao, a tiny but busy Pacific coast fishing village.
The weather at the time was sunny but a typhoon swept across parts of the island hours before.
Disaster relief officials would not say if the storm had weakened the bridge or give other details on the possible cause. Government-run Central News Agency said a bridge pier may have collapsed.
Taiwan President Tsai Ing-wen said she hoped all government departments would do everything possible to save people and "keep the number of deaths and injuries as low as possible", CNA reported.
National Fire Agency spokesman Su Hong-wei said the tanker fell onto three boats. Of the 10 people in hospital, six are Filipinos and three are Indonesians. People from both countries regularly staff Taiwanese-registered boats.
Typhoon Mitag had brought high winds and heavy rain to northern Taiwan on Monday night before moving on. Flights and ferry services were cancelled on Monday.
Nanfangao Bridge is a tourist attraction in Yilan. It was opened in 1998 and was built to replace a lower bridge that prevented large fishing vessels from passing underneath.
According to the company that designed the 18-metre-high (nearly 60 feet) high bridge, MAA Consultants, it's the only single-span arch bridge in Taiwan supported by cables and the second single arch-cable steel bridge in the world.
Additional reporting by the Associated Press
