Staples Inc. of Framingham, Mass. and RadioShack Corp. of Fort Worth, Texas each announced multiple store closures nationwide this week. Staples will be closing the door at 225 locations, while RadioShack is taking a much deeper cut with 1,100 planned closures.

The local impact in the San Fernando Valley is unclear, as neither retailer has released a list of the stores will close. But there are 12 Staples and 21 RadioShack stores located in the Valley that could be affected.

Staples officials cited the demand for online shopping as its reason to reduce its brick-and-mortar store count.

“As customers shift online, we are taking aggressive action to right-size our retail footprint,” the company said in a statement. “We are committed to providing great service and every product businesses need whether it’s in-store, online or through mobile. We don’t have additional details to share on specific locations or timing.”

RadioShack’s announcement to cut 20 percent of its stores comes about a month after The Wall Street Journal reported that the chain could put about 500 stores on the chopping block.

The electronics retail chain said in a statement that it was not yet releasing the locations of the closures, “However, RadioShack will maintain market coverage as part of this plan, with more than 4,000 U.S. stores in the RadioShack footprint. We will have information to share in the future.”