National Harbor, where MGM has proposed building a casino. (Linda Davidson/The Washington Post)

Officials from MGM Resorts on Wednesday confirmed that the company will bid this week for a license to build and operate a new casino in Prince George’s County.

MGM announced plans for a news conference on Thursday, the day before bids are due to the state, at their proposed casino site at National Harbor, the 300-acre mini-city on the banks of the Potomac River.

Following the morning news conference, company officials said they plan to drive their bid materials up to Baltimore to the office of the Maryland Lottery and Gaming Control Agency.

The move came a few days after Penn National Gaming said in a federal regulatory filing that it “intends” to bid to put a casino at Rosecroft Raceway in Fort Washington. A Penn spokeswoman said Monday, however, that no final decision has been made.

Bids are being accepted for venues in a western swath of Prince George’s that includes both National Harbor and Rosecroft, a horse track that Penn bought in a bankruptcy auction in 2011. No other bidders have made their plans public.

The chairman of the state commission that picks Maryland’s gambling sites has said he hopes to pick a Prince George’s location by the end of the year. Under state law, the earliest the casino — which will be Maryland’s sixth — is likely to open is mid-2016.

“MGM envisions applying its decades of worldwide resort experience to design a fully-appointed destination resort casino at National Harbor that respects the atmosphere of Prince George’s County and meets the needs of Maryland’s marketplace,” the company said in a statement Wednesday.