Iranian police have arrested a suicide bomber who was planning to carry out attacks near the country's capital, Tehran, Tasnim reported.

Tehran's police chief told reporters on Wednesday that the terrorist was arrested at a toll station on the highway linking Tehran with Qom, 120 km south of the capital.

General Hossein Rahimi said the arrested man is an Iranian citizen who rented a car to leave Tehran and then detained the driver, threatening him with a gun.

Police grabbed the bomber and sappers confiscated two-round weapons, suicide bomber vests, incendiary devices, and explosives powerful enough to cause an explosion, he added.