SHANGHAI, China -- Shanghai has constructed a massive underground bunker complex capable of sheltering 200,000 people from a nuclear attack, a local newspaper reported.

The million-square-foot complex connects to shopping centers, office buildings, apartment buildings and the subway system via miles of tunnels, the Shanghai Morning Post said in an exclusive report.

The newspaper said the complex has water, electricity, lighting, ventilation and protective doors, and can support life for as long as two weeks.

The Saturday report didn't say when the complex was finished or whether it was built with any specific threats in mind.

Shanghai was hit by air raids during World War II and, like most cities, dug vast underground complexes during the Cold War, when leader Mao Zedong believed a nuclear war with the Soviet Union was imminent.

In recent years, the city of 20 million has recovered its role as China's financial center and is a key business and manufacturing hub.