UPDATE 3-Trump taking serious look at policy options on Amazon.com

(Updates with Trump comments aboard Air Force One)

WASHINGTON, April 5 (Reuters) - U.S. President Donald Trump said on Thursday he would take a serious look at policies to address what he says are the unfair business advantages of online retailer Amazon.com Inc

Speaking to reporters while traveling back to Washington from West Virginia, he accused Amazon of not operating on a level playing field.

Asked if he wanted to make policy changes related to the company, Trump said: "Were going to take a very serious look at that."

His comments followed a tweet earlier in the day calling the Washington Post the "chief lobbyist" for the e-commerce company His lobbying allegations repeated a previous unsubstantiated attack on the newspaper, while White House officials in recent days have said no policy changes related to Amazon were currently planned

The Washington Post is privately owned by Jeff Bezos, the founder and chief executive officer of the online retailer. Amazon does not own the Post.

Trump regularly lashes out against what he perceives as critical articles in the Post as well as the New York Times and CNN. On Thursday, he took issue with a headline in the Post on China retaliating with trade penalties against U.S. products.

(Reporting by Washington newsroom; Editing by Jeffrey Benkoe and Peter Cooney)