KIEV, July 25 - The tariff for Russian gas transit across Ukraine increased to $3.11 for 1,000 meters per 100 kilometers in the second quarter of 2012, says the Ukrainian eurobond prospectus.

The tariff was $3.08 in the first quarter of 2012, it says.

Reports said earlier that the charge for gas transit across Ukraine was $1.7 for 1,000 cubic meters per 100 kilometers in 2009 and averaged $2.65 in 2010.