The Indonesian military is expected to buy Russian helicopters, tanks and submarines after a planned visit by Russian President Vladimir Putin to the country on Thursday.

On his one-day visit to Jakarta, Putin and his counterpart Susilo Bambang Yudhoyono will witness the signing of Indonesia's credit purchase of 22 helicopters, 20 tanks and 2 submarines from Russia, English daily the Jakarta Post reported Tuesday.

Defense Ministry Spokesman Brig. Gen. Edy Butar Butar has said the purchase, worth US$1 billion and payable within 15 years, would supply the military with 17 passenger helicopters and 5 offensive helicopters and the navy with 2 submarines and 20 amphibian tanks.

"The air force will also receive weapons and equipment for its Shukoi squadron, because on top of the US$1 billion purchase we will also buy six Shukoi jet fighters worth US$335 million," Butar Butar told the newspaper, referring to another agreement with Russia.

Both presidents will also witness the signing of oil and gas contracts and agreements on environmental cooperation.