Regulators say about $1.2 billion is missing from customers' accounts following the collapse of MF Global. Minnesota farmers, ranchers, feed mills and grain elevators are among those customers. Now they're waiting to find out just how much they might be missing.

MF Global is being investigated over what federal regulators say is an estimated $1.2 billion that may be missing from customer accounts.

U.S. Sen. Amy Klobuchar and 16 other senators have mailed a letter to the U.S. attorney general urging an investigation into and possibly the criminal prosecution of MF Global executives, who may have made illegal transactions using customer funds. Many of Minnesota's farmers and agricultural businesses have been missing money since the commodities trader collapsed.

A thunderstorm collapsed a silo and barn near Colby Thursday, and a farmer working inside was able to slip out with his life, the Marshfield News Herald reports. About 20 dairy cows were trapped in the rubble. The National Weather Service says 70- to 80-mph winds likely did in the structure.

Reuters reports the Chicago Mercantile Exchange has set up a $100 million fund to help farmers and ranchers who lost money after the collapse of commodities trading firm MF Global. Many farmers and agricultural businesses in Minnesota saw their accounts frozen after the firm suddenly went belly-up.

Dean Tofteland blasted the now-defunct commodities firm MF Global in front of a Senate Ag committee Tuesday morning. The Star Tribune reports that the Luverne farmer didn't mince words when it came to how he felt about having more than $250,000 of his money frozen. More than $1 billion of MF Global's assets are unaccounted for.

Bloomberg reports Timothy McGee, an investment advisor for the Minneapolis-based company in Philadelphia, allegedly used confident information received from an Alcoholics Anonymous meeting to profit from a merger in 2008. McGee and eight others made about $1.8 million before Philadelphia Consolidated Holding Corp. announced it would be acquired by Tokio Marine Holding Inc.