Mitt Romney secures wins in Arizona and Michigan

US Republican White House contender Mitt Romney has pulled off a double win in the Michigan and Arizona primaries.

"We didn't win by a lot, but we won by enough and that's what counts," Mr Romney said in Michigan.

With almost all votes counted, Mr Romney had an unassailable lead in both states over Rick Santorum in second.

Michigan was seen as vital for Mr Romney, who was born in the state, but he had struggled to win over conservative voters.

Former House Speaker Newt Gingrich and Texas Congressman Ron Paul did not actively campaign in Arizona and Michigan, focusing on contests scheduled for next week.

In Arizona, Mr Romney had 47% of the votes to Mr Santorum's 27%; and was ahead in Michigan by 41% to 38%.

Mr Gingrich was on course to poll 16% in Arizona, with Mr Paul on 8%. In Michigan, Mr Paul has won 12% of the vote, with 7% for Mr Gingrich.

BBC News