At least four people are reported to have died following an earthquake in Taiwan - the strongest in the country for a quarter of a century - officials have said.
At 7.58am local time, the earthquake struck 25km (15.5 miles) south of Hualien, a city on the country's east coast, triggering landslides and building collapses across the area.
Over 700 people have been injured in the quake, Taiwan's government has said, while people are still trapped in collapsed buildings in Hualien with search efforts underway.
The quake was measured at 7.7 on the Richter scale, according to Japan's meteorological agency, while Taiwan's earthquake monitoring service recorded a 7.2.
The tremors heralded tsunami warnings in Taiwan, Japan and the Philippines - though the latter two have since lifted their alerts.
More than 87,000 households have been left without power across the whole island of Taiwan, the country's electricity provider Taipower has said, while transport infrastructure has been damaged and schools and workplaces have been shut in Hualien.
Taiwanese capital Taipei experienced violent shaking and aftershocks through the day, prompting a temporary suspension of its underground rail network.
China's Taiwan Affairs Office said it was "highly concerned" with the news and was willing to provide disaster relief assistance, according to Chinese state media.
Japan's Prime Minister, Fumio Kishida, said on social media: "To the people of Taiwan, I am deeply saddened to hear that a large earthquake has occurred in eastern Taiwan, causing extensive damage.
"I would like to express my heartfelt sympathies to those affected. We are grateful for the heartwarming support we received from our dear friends in Taiwan during the Great East Japan Earthquake and the recent Noto Peninsula earthquake.
"We are extremely grateful, and Japan stands ready to provide any assistance necessary to Taiwan, our neighbor across the sea, in times of difficulty."
