US official: US in urgent talks on what to do about Russia flight incursion into Turkey

US Secretary of Defense Ashton Carter listens to a question during a joint news conference with Spain's Defense Minister Pedro Morenes following their meeting at the Spanish Defense Ministry in Madrid, Monday, Oct. 5, 2015. Carter arrived to Madrid for a two-day official visit to Spain. (AP Photo/Francisco Seco) (The Associated Press)

U.S. Secretary of State John Kerry addresses the Our Ocean international conference on marine protection in Vina del Mar, Chile, Monday, Oct. 5, 2015. President Barack Obama declared new marine sanctuaries in Lake Michigan and the tidal waters of Maryland on Monday, while Chile blocked off a vast expanse of the Pacific Ocean near the world-famous Easter Island from commercial fishing and oil and gas exploration. (AP Photo/Luis Hidalgo) (The Associated Press)

MADRID – A senior U.S. official says the U.S. does not believe Russia's incursion into Turkey's airspace was an accident, and urgent talks are underway on what to do about the weekend incident.

The official says the event is the type of unprofessional military conduct that U.S. Defense Secretary Ash Carter spoke with the Russian defense minister about during their recent phone call.

Carter says the U.S. is conferring with Turkish leaders about the airspace violation and that the issue will come up later this week at the NATO meeting of defense ministers. Carter spoke during a press conference here with the Spanish defense minister.

The senior U.S. official was not authorized to discuss the talks publicly so spoke on condition of anonymity.