LOS ANGELES — The Oakland Raiders and San Diego Chargers are planning a shared stadium in the Los Angeles area if both teams fail to get new stadium deals in their current hometowns, the teams said in a joint statement, adding another layer of complexity to a possible NFL return to the region.

The proposed $1.7-billion stadium would be in Carson, 15 miles south of downtown Los Angeles and home to the Los Angeles Galaxy soccer team.

The statement says the teams have tried and failed for years to find stadium solutions in Oakland and San Diego.