Russia said on Thursday it would try to bring home convicted former arms dealer Viktor Bout, subject of the book Merchant of Death, and accused the United States of subjecting him to controversial detention methods.

The former Soviet air force officer was found guilty by a New York jury on Wednesday of agreeing to sell arms to people he thought were Colombian militants intent on attacking American soldiers. He faces between 25 years and life in prison.

Our goal is to try to succeed in bringing him to his motherland, Russian Foreign Ministry spokesman Alexander Lukashevich said in a statement, declining to say how Russia would carry this out.

Bout had pleaded not guilty in the trial, a case which could further upset the reset aimed at improving U.S.-Russian relations under U.S. President Barack Obama and his Russian counterpart Dmitry Medvedev.

His conviction comes weeks after Russia banned some U.S. officials from visiting the country in a tit-for-tat visa row over the prison death of hedge fund lawyer Sergei Magnitsky.

Bout was arrested in Bangkok in 2008 in a U.S. Drug Enforcement Administration (DEA) sting operation and extradited to the United States two years later to face terrorism-related charges.

Russia's foreign ministry said U.S. special services had subjected Bout to unjustifiably harsh detention conditions and controversial methods of a physical and psychological nature that contradict existing international rights standards.

All these factors have called into question the very facts on which the prosecution was based, and consequently the verdict, it said.

Bout was convicted on two counts of conspiracy to kill U.S. nationals and officers, and one count each of conspiracy to sell anti-aircraft missiles and providing material support to a terrorist organisation.

The Foreign Ministry of Russia will take and will continue to take all measures to protect the legal rights and interests of V.A. Bout, as he is a citizen of Russia, the statement said.

(Reporting by Amie Ferris-Rotman; Editing by Vladimir Soldatkin)