SHANGHAI - A power failure has delayed 29 trains on China's newly built high-speed railway linking Beijing and Shanghai, shortly after a similar incident halted 11 of the railway's trains two days ago, sources with the Shanghai Railway Bureau confirmed Tuesday.

The railway's power was cut off at about 11 am near the city of Suzhou in East China's Anhui province and was resumed two hours later after repairs were completed, the bureau said in a statement.

The Ministry of Railways made an apology on its website to passengers who were affected by the delays.

The power failure was the second within three days after a similar incident delayed 11 trains on Sunday night.

A Shanghai-bound bullet train broke down at 6:10 pm Sunday near East China's Shandong province and resumed operation about an hour and a half later.

Railway authorities said the power failure was caused by thunderstorms.

The Beijing-Shanghai high-speed railway went into operation on June 30. The 1,318-kilometer railway allows passengers to travel between the two cities in less than five hours.

The railway is designed to handle maximum train speeds of 350 km per hour.