Tragedy on a Virginia dairy farm, as four members of a Mennonite family died trying to rescue a farmhand and each other from a manure pit.
Rockingham County authorities say five people in all were killed by methane gas emanating from the pit.
The sheriff says emergency workers speculate that each of the victims climbed into the pit in a frantic attempt to rescue the others.
The victims included a couple and two of their daughters, ages 9 and 11.
Methane gas is a byproduct of liquefied manure.