SEOUL – Typhoon Kompasu struck South Korea early Thursday, killing three people while it knocked over streetlights and scaffolding in what was called the strongest tropical storm to hit the Seoul area in 15 years.

Powerful gusts knocked over power lines, cutting off power to tens of thousands of homes and forcing airports to cancel or delay dozens of international flights, the National Emergency Management Agency said.

Streets of Seoul were littered with beaten tree leaves and branches and toppled construction.

Some parked cars were wrecked by scaffolding knocked over by the typhoon.

More than 60 international flights were delayed or canceled, mostly to and from China, officials at Incheon and Gimpo airports said. Service on two Seoul subway lines and five railway routes was suspended, NEMA officials said.

An 80-year-old man died after being hit by a roof tile and a 37-year-old businessman was killed on his way to work by a falling tree branch, the emergency management agency said. A 75-year-old man was electrocuted while examining a transformer, and four people were injured by broken glass, it said.

Elementary and middle schools in the capital, Seoul, were ordered to delay the start of the school day by two hours, while all public and private kindergartens were closed for the day, the Seoul Metropolitan Office of Education said.

The storm caused at least 10 billion won ($8.3 million) in damages to a soccer stadium in Incheon, west of Seoul, stadium officials said.

Power was out at more than 60,000 homes along South Korea's west coast, officials said.