Summary Box:

AP News
Posted: Mar 12, 2012 12:16 PM
Summary Box:

LINE DOWN: Part of a high-speed railway line collapsed in central China following heavy rains, state media reported Monday, reviving safety concerns.

SHARES SHAKEN: Reports of the Friday incident, the latest since a bullet-train crash last summer killed 40 people, rattled stock markets in Hong Kong and Shanghai, where railway shares dropped.

CUTTING CORNERS: Engineers working on some rail projects have complained about contractors using inferior concrete and inadequate support bars. A state-run magazine last week reported allegations that builders on another section of the same line may have compromised safety by substituting soil for rocks in the railway bed.