Russian President Dmitry Medvedev said he hopes to sign a set of documents on cooperation during his two-day visit to Ukraine that starts Monday.

"These are a number of agreements being developed and coordinated now. They concern production and energy cooperation, as well as cooperation in humanitarian exchanges, in interregional and international problems," Medvedev told Ukrainian media on Sunday, RIA Novosti reports.

The Russian leader said agreements on Black Sea security, settlement in Moldova's breakaway region of Transdnestr and European security issues could also be signed.

Transdnestr has been considered a "frozen conflict" zone since a brief war in 1992, which was the culmination of tensions between Chisinau and Tiraspol following the breakup of the Soviet Union. Russia, Ukraine and the OSCE are mediators in the conflict; the EU and the United States are observers.

Speaking to Ukrainian media Russian President Dmitry Medvedev said Russia and Ukraine should create maximally favorable conditions for mutual investment.

Medvedev said that under the previous Ukrainian administration, "many contacts were frozen," and that Moscow was even discontent with the way its neighbor treated Russian investments.

"Unfortunately it was connected with the intra-political squabbles you were going through at the time. Now [we] need to overcome the situation and try to create a maximally favorable investment climate," the Russian president said.

Medvedev added that he does not believe "direct management of investment" "by the state and government" is always productive, "especially when we speak of private investors."

"The task of the state is to protect these investments... Business contacts should be established by representatives of the business elite," he said.

Speaking about recently signed an agreement extending the lease on the Russian Black Sea Fleet base in the Ukrainian port of Sevastopo, Russian President Dmitry Medvedev said Russia's naval base in the city of Sevastopol in Ukraine's Crimea guarantees European security integrity.

"Preserving the presence of our naval base means at least preserving the setup that formed rather long ago, and a safeguard against the desire to repartition something in the sphere of European security," Medvedev told Ukrainian media Monday.

"I am speaking about entire Europe," he said, adding that the EU and NATO reacted calmly to the lease extension. "This is wise," the Russian leader said.

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