In a separate incident, security forces killed two members of a far-left militant group in a clash in Tunceli province late on Tuesday, security sources said on condition of anonymity.
The soldiers who were wounded were on foot patrol in Van province when members of the Kurdistan Workers Party (PKK) detonated an explosive by remote control, the sources said.
A PKK spokesman reached by telephone in northern Iraq did not have information on the attack.
The PKK has stepped up attacks on Turkish military targets this month after calling off its year-long truce. Twenty-two soldiers have died in attacks in June, according to media reports.
Violence traditionally rises in Turkey's mainly Kurdish southeast, which borders Iraq, in the spring and summer months as warmer weather allows the PKK and the army to move more easily through the region's mountainous terrain.
The PKK, now largely based in northern Iraq, took up arms against Turkey in 1984 in a bid to carve out a Kurdish state, and more than 40,000 people, mainly Kurds, have died in the war.
The group now says it is fighting for greater political rights for Kurds, who make up about 15 percent of Turkey's population of 72 million people.
Amid the rise in attacks, special Turkish commando teams have pursued PKK rebels into northern Iraq and are now camped out in areas thought to be used by the rebels, security officials also said.
In the Tunceli clash, soldiers killed two members of the Maoist Communist Party (MKP), one of whom was a woman, the sources said.
The MKP are armed leftists based in rural parts of the Kurdish southeast who are not thought to have outright links with the PKK. The MKP has been largely inactive since most of its leadership was killed by the army in 2005.
