Russian authorities are opening more military enlistment offices near Russia's borders in an apparent effort to intercept some of the men of fighting age who are trying to leave Russia by land to avoid getting called up to fight in Ukraine.

A new draft office opened in the Saratov region, at the Ozinki checkpoint on Russia's border with Kazakhstan, regional officials said Thursday. Another enlistment center was set to open at a crossing in the Astrakhan region, also on the border with Kazakhstan, according to the regional administration.

Earlier this week, makeshift draft offices were set up near the Verkhny Lars border crossing into Georgia in southern Russia and near the Torfyanka checkpoint on Russia's border with Finland. Russian officials said they would hand call-up notices to all eligible men who were trying to leave the country.

Over 194,000 Russian nationals have fled to neighboring Georgia, Kazakhstan and Finland most often by car, bicycle or on foot since President Vladimir Putin last week announced a partial mobilization of reservists. In Russia, all men under age 65 are automatically considered part of the army reserves.

The mass exodus of men alone or with their families or friends began Sept. 21, shortly after Putin's address to the nation, and continued all this week. Airline tickets to destinations abroad have sold out days in advance, even at unprecedentedly high prices.

Long lines of cars formed on roads leading to Russia's borders. Russian authorities tried to stem the outflow by turning back some men at the borders, citing mobilization laws, or setting up draft offices at border checkpoints.

The bus stations in Samara and Tolyatti, two large cities in the Samara region, on Thursday halted service to Uralsk, a border city in Kazakhstan.