Washington: US President Donald Trump has named Lt. Gen. H.R. McMaster as his new national security adviser, succeeding Michael Flynn, who left last week amid criticism of his pre-inauguration contacts with the Russian ambassador.

"General H.R. McMaster will become the national security adviser. He's a man of tremendous talent and tremendous experience," Trump, who was accompanied by the general, said in a surprise announcement at his Mar-a-Lago estate in Palm Beach, Florida, Efe news reported on Monday.