President Obama spoke by phone on Monday with Russian President Vladimir Putin to discuss a series of thorny international issues.

But Obama did not raise the issue of Russian military jets buzzing a U.S. Navy ship last week in the Baltic Sea.

The two leaders had a “rather intense discussion” about the civil war in Syria and Russia’s intervention in Ukraine, according to White House press secretary Josh Earnest.

“That did not come up in the call between the two presidents,” Earnest said when asked about the jets. Such incidents are “destabilizing” but “not particularly unusual,” he added.

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