NAZRAN, April 23 (RIA Novosti) - Two officers from the Federal Security Service (FSB) Ingushetia branch were wounded when their vehicle came under fire on Wednesday, a spokesman for the south Russian republic's prosecutor's office said.

"Preliminary reports indicate that unknown assailants shot at a car containing two local FSB officers at about 18:00 Moscow time (14:00 GMT) near the village of Surkhakhi," the source said.

The injured have been hospitalized in a serious condition, he said.

He added that an investigative team is currently working at the scene and a decision would soon be made whether to open a criminal case into the attack.

Although the active phase of the antiterrorism campaign in the North Caucasus officially ended in 2001, periodic bombings and clashes between militants and federal troops still disrupt Chechnya and nearby regions, including Daghestan and Ingushetia.