WASHINGTON (AP) - Regulators on Friday shut down Colonial BancGroup Inc., a big lender in real estate development that marked the biggest U.S. bank failure this year, and a small bank in Pennsylvania.

The closures boosted to 74 the number of federally insured banks that have failed in 2009.

The Federal Deposit Insurance Corp. was appointed receiver of Montgomery, Ala.-based Colonial, with about $25 billion in assets, and Dwelling House Savings and Loan Association, located in Pittsburgh. The agency approved the sale of Colonial's $20 billion in deposits and about $22 billion of its assets to BB&T Corp., which is based in Winston-Salem, N.C. The failed bank's 346 branches in Alabama, Florida, Georgia, Nevada and Texas will reopen at the normal times starting on Saturday as offices of BB&T, the FDIC said.