Officials said an unnamed 40-year-old Georgian national was shot dead by a cyclist in a Berlin park on Friday afternoon. A 49-year-old suspect, also unnamed, was arrested shortly after near the crime scene.

German authorities have arrested a Russian suspect on suspicion of killing a Georgian national over his alleged involvement in the second Chechen war in what is being reported as a contract killing by foreign intelligence.

The slain victim was Zelimkhan Khangoshvili, an ethnic Chechen born in Georgia, the republic of Chechnya’s Vayfond human rights organization announced over the weekend.

German media reported that Khangoshvili fought in the second Chechen war of 1999-2009 and was fighting a deportation order to keep his asylum claim alive.

He served as a field commander in 2001-2005, Georgia’s Human Rights Education and Monitoring Center group said. He had fought on the side of the Chechen resistance against Russian and Chechen government forces, Vayfond said.

Investigators are looking at his death as a "professionally planned and executed contract killing" by a foreign intelligence service, Germany's Der Spiegel news website cited unnamed sources in the security services as saying.

On Aug. 29, the Kommersant business daily reported that the suspect has been identified as Vadim Sergeyevich, a native of Siberia, but withheld his last name. The man was likely carrying fake documents to conceal his identity, Kommersant cited acquaintances of Khangoshvili as saying.