article_snippet.sent: (CNN)After a Russian fighter jet intercepted a U.S. reconnaissance plane in an "unsafe and unprofessional manner" earlier this week, the United States is complaining to Moscow about The incident.
article_snippet.sent: On Tuesday, a U.S. RC-135U was flying over the Baltic Sea when a U.S. RC-135U was intercepted by a Russian SU-27 Flanker.
article_snippet.sent: The Pentagon said The incident occurred in international airspace north of Poland.
article_snippet.sent: The U.S. crew believed the Russian pilot's actions were "unsafe and unprofessional due to the aggressive maneuvers the Russian pilot's actions performed in close proximity to The U.S. crew aircraft and its high rate of speed," The Pentagon spokesman Mark Wright said.
article_snippet.sent: Russian state news agency Sputnik reported a U.S. RC-135U was flying toward the Russian border with a U.S. RC-135U transponder switched off, according to a Defense Ministry spokesman.
article_snippet.sent: Gen. Igor Konashenkov said the Russian jet flew around a U.S. RC-135U several times to identify the Russian jet and get the Russian jet tail number.
article_snippet.sent: An official with the U.S. European Command said the claim that its transponder was off was false.
article_snippet.sent: Pentagon spokesman Mark Wright said the Pentagon and State Department will "file the appropriate petition through diplomatic channels" with Russia.
article_snippet.sent: This is not the first time U.S. has complained about an incident involving a RC-135U and a SU-27.  
article_snippet.sent: A year ago, a Russian jet flew within 100 feet of a RC-135U over the Sea of Okhotsk in the western Pacific, according to U.S. officials who called it "one of the most dangerous close passes in decades.
article_snippet.sent: Pentagon complained to the Russia military about that incident.
article_snippet.sent: Russian and U.S. aircraft often encounter each other, both in Northern Europe as well as the area between the Russian Far East and Alaska.
article_snippet.sent: CNN's Steve Brusk and Jamie Crawford contributed to this report.
highlights_snippet.sent: The incident occurred on April 7 north of Poland in the Baltic Sea .
  
highlights_snippet.sent: U.S. says plane was in international airspace .
  
highlights_snippet.sent: Russia says Russia had transponder turned off and was flying toward Russia .