A fire broke out at China's tallest building in the economic hub of Shanghai on Tuesday afternoon, eyewitnesses said, but police said there were no reports of casualties.
One eyewitness saw smoke and flames coming from around halfway up the 101-storey Shanghai World Financial Centre at about 4:30 p.m., but he said the fire appeared to have been extinguished in less than 30 minutes.
Shanghai police confirmed that a fire had broken out at the building just after 4:30 p.m. and that firefighters had extinguished it by 5:45 p.m.
"The firefighters searched the building floor by floor and confirmed that there were no more fires and no casualties," the police said in a statement.
Electric welding equipment had caused the fire but the exact details were still under investigation, the statement said.
Fire engines were still leaving the construction site early Tuesday evening and about 70 windows appeared to have been blown out from several stories on one side of the building.
The Shanghai World Financial Centre, constructed by Japan's Mori Building, is already more than 420 metres tall and is designed to have a final height of 492 metres when it is completed early next year.
Plans for the building include commercial facilities in the lower floors and office space from the 7th to 77th floors.
The 79th to the 93rd floors are earmarked for a Park Hyatt hotel.
State media said the average rent of office in the tower will also be the highest in China, at 3.3 dollars per square metre per day.
Construction of the tower began in 1997 but was suspended during the Asian financial crisis.