Two windows and a section of the glass exterior of a commercial building fell in various parts of the city yesterday, bringing the number of such cases to about 40 in the past month.
No one was injured in the three incidents yesterday, which occurred in Yau Ma Tei, Choi Wan Estate in eastern Kowloon and North Point.
The first incident happened at 9am. A 1-square-metre piece of glass dropped from a commercial building in Yau Ma Tei onto a car, scratching its roof and boot.
Officers said the glass came from the 22nd or 23rd floor of the building in Shanghai Street.
Buildings Department engineers inspected the building and declared it safe. A spokesman said investigators would return to determine the cause of the accident.
Workers from the building's management company were told to clean the exterior, check for cracks on any glass panels and remove any loose materials.