There was an uptick in traffic from Russia at border points in Southeastern Finland on Wednesday night, according to the Border Guard.
The increase was noted on the same day that Russian President Vladimir Putin announced plans for a partial military mobilisation to bolster the country's war effort in Ukraine.
Border Guard personnel at crossings in Vaalimaa, Nuijamaa and Imatra were continuing to prepare for possible further increases in traffic this week.
The agency's international affairs unit chief, Matti Pitkäniitty, tweeted on Thursday morning that 4,824 Russians entered Finland through the eastern border on Wednesday, adding that the figure was lower than on a typical weekend.
On Wednesday a week ago, the agency counted 3,133 Russians crossing into Finland.
The Border Guard confirmed that some Russians were refused entry, but did not specify the reasons.
Traffic at the border will likely be busy for the rest of the week and into the weekend, according to Master Sergeant Tuomas Hurskainen, of the Border Guard in Southeastern Finland.
He said that the situation on Thursday was "completely normal," and that there was nothing to be concerned about at the moment.
Among other things, Putin's announcement about the mobilisation plans on Wednesday prompted rumours to circulate on social media that there would be long queues of cars at Finland's eastern border.
The Border Guard noted that out-of-context videos containing false information about the situation were also circulating on social media.