The Finnish Foreign Ministry is recommending that residents of Finland travelling to Sweden ensure they take their passport or photo identification card with them.
The recommendation follows the announcement by Swedish police that security checks will be tighter along the borders that Sweden shares with other Nordic countries. Friday's terror attack in Stockholm that left four people dead and fifteen injured when a man hijacked a truck and drove it through a crowded pedestrian street has put Sweden on high alert.
Swedish police have a suspect in custody, a 39-year-old man originally from Uzbekistan, who is known to Swedish security police.
Security upped in Finland, too
In Finland, the Finnish Border Guard has also increased security at key points of entry including Helsinki Airport and the ports of Helsinki, Turku and Mariehamn.