GM grass producing cyanide gas, kills herd of cattle

So far the cyanide gas-producing grass has only killed one herd, though the cyanide gas is also present in other nearby fields. Strange.

A mysterious mass death of a herd of cattle has prompted a federal investigation in Central Texas.

Preliminary test results are blaming the deaths on the grass the cows were eating when they got sick, reports CBS Station KEYE.

The cows dropped dead several weeks ago on an 80-acre ranch owned by Jerry Abel in Elgin, just east of Austin.

The other open question is what impact this may have on the cattle that don't die, that make it to the food plate.