BEIJING (AP) — Chinese authorities on Saturday said a small plane that crashed into a building in Beijing the day before had killed the pilot and injured 13 others.

The authorities of the Chaoyang district, a vibrant business area, said a two-seat light sport aircraft collided with a high-rise building at 5:55 p.m. on Friday and caused the casualties.

The short statement on WeChat did not identify the building or the pilot. The global flight tracking service provider Flightradar24 on Friday said the plane crashed into the CITIC Tower, also known as China Zun, which rises more than 1,700 feet (528 meters), just east of a major ring road in a cluster of skyscrapers.

The 108-story CITIC tower, shaped like an ancient Chinese wine vessel, is one of the most recognizable skyscrapers in Beijing and is the tallest building in the city.

It was not immediately known what caused the crash in a city with strict airspace controls, including a recent ban on drones. An investigation is underway into the situation, the authorities said.