TEHRAN, July 26 (Xinhua) -- Two underground trains collided with each other at an eastern Tehran station on Wednesday, Iranian local Fars News Agency reported.

    Meanwhile, a witness at the scene told Xinhua that at least 18 people were injured in the collision at the Dar-Dasht station in eastern Tehran.

    Fire fighters had rushed to the scene, according to the witness, who also said that the accident seemed to be caused by "technical problems." Enditem