By Laurence Norman and Julian Barnes

BRUSSELS--U.S. President-elect Donald Trump Friday spoke with the head of the North Atlantic Treaty Organization and a senior European Union official.

In a tweet on his verified account, NATO Secretary General Jens Stoltenberg said it had been a "good talk" with Mr. Trump.

"We both underlined the enduring importance of #NATO and increased defence spending," he said.

The two men also discussed how NATO could adapt to security challenges, including terrorism, according to an account of the call provided by the alliance.

Mr. Stoltenberg has in recent remarks discussed how he shares Mr. Trump's view that Europe needs to spend more on defense. In the call, Mr. Stoltenberg thanked Mr. Trump for raising the issue during the campaign.

Mr. Trump has questioned the relevance of the NATO military alliance and suggested American military support could be conditional on European military spending. He has also said he wants to improve U.S. relations with Russia. Mr. Stoltenberg had been critical of some of Mr. Trump's campaign comments.

Mr. Trump also spoke with European Council President Donald Tusk on Friday afternoon, the first contact the president-elect has held with one of the top-ranking EU officials.

The two men spoke for around 10 minutes, according to an EU official. Mr. Tusk repeated his invitation for Mr. Trump to come to Brussels for the next EU-U.S. summit, and the president-elect said he would come to Europe. He invited Mr. Tusk to visit him in Washington before that.

Mr. Tusk raised the issues of Ukraine and the trans-Atlantic partnership with Mr. Trump.

Write to Laurence Norman at laurence.norman@wsj.com and Julian Barnes at julian.barnes@wsj.com

(END) Dow Jones Newswires

November 18, 2016 12:10 ET (17:10 GMT)

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