WASHINGTON (MarketWatch) — Federal regulators on Friday closed four banks, bringing the total number of failures this year in the U.S. to 143. Two banks in California, Western Commercial Bank in Woodland Hills and First Vietnamese American Bank in Westminster, were shut down. Their assets will be sold to healthier financial institutions, according to the Federal Deposit Insurance Corp. Western Commercial had $101.1 million in deposits and First Vietnamese $47 million. Regulators also closed two larger banks in Maryland and Washington state. K Bank, based in Randallstown, Md., had $500.1 million in deposits as of Sept. 30, while Tacoma, Wa.-based Pierre Commercial Bank totaled $193.5 million in deposits. The failure of the four banks will cost the federal deposit-insurance fund a combined $254.5 million. Hundreds of banks have failed over the past few years after a banking crisis in 2007 and the severe recession that followed.