Two of the soldiers were seriously hurt, while the two others sustained lighter injuries.
The troops were on patrol on Saturday morning 40 kilometres west of Mazar-i-Sharif when their RG-32 armoured patrol vehicle hit an improvised explosive device. Five other vehicles were part of the patrol unit; however, they were not harmed by the explosion.
Army spokesman Lauri Inna says the soldiers are now in stable condition and are being treated in a German field hospital.
A second roadside bomb hit another Finnish convoy on Saturday evening. No one was hurt in the second attack.
Nordic Soldiers Increasingly Targeted
Attacks on peacekeeping forces have been on the rise in Afghanistan, including in the joint Swedish-Finnish operational area in the north of the country.
“It’s clear that it’s impossible to avoid these types of situations,” says Inna.
This year 386 foreign soldiers have lost their lives in Afghanistan. American soldiers account for the majority of foreign military casualties. Currently some 100,000 foreign soldiers are stationed in the country.
Finland has around 200 soldiers serving in Afghanistan as part of the NATO-led International Security Assistance Force.