An Iranian navy commander said Sunday that Iran used cyber defense techniques in its ongoing naval military exercises, Press TV reported.

On Friday, Iranian navy launched a six-day massive drill in its southern waters. The naval drills, dubbed Velayat 91, or Guardianship 91, are being carried out in the Strait of Hormuz, the Sea of Oman, the north of the Indian Ocean, the Gulf of Aden and the Bab-el-Mandeb Strait.

"During the second day of the drills, aggressive forces launched a cyber attack against the computer network of defensive forces in order to infiltrate the network and hack information or spread viruses," Rear Admiral Amir Rastegari said, adding that the cyber defense forces successfully detected the threat and blocked it.

Iranian navy's "cyber defense group" is a specialized unit that monitors and protects the computer network of the naval forces and detects "all cyber infiltration and immediately takes necessary measures to counter them," Rastegari said.

Meanwhile, Rastegari said that Iran's Navy tested the operational capabilities of its home-made hovercrafts on the third day of the drills, according to semi-official Fars news agency.

Different naval units also embarked on conducting coastal defense against hypothetical enemy forces, Rastegari was quoted as saying.