TEHRAN, Young Journalists Club (YJC) - The assailant broke into the Ekho Moskvy offices and stabbed deputy editor Tatyana Felgenhauer, editor-in-chief Alexei Venediktov said. She is best known for co-hosting a popular morning radio show.
Felgenhauer, 32, underwent surgery at a hospital and was put in medically-induced coma as doctors determine the best course of treatment, he said.
The attacker, after being apprehended, told investigators he had been in "telepathic contact with Felgenhauer" for five years.
The station said the attack was clearly premeditated. To get into the building, the assailant sprayed gas in the face of a security guard at the entrance on the ground floor then went up to the 14th floor, where the station's studios are.
"The man came here on purpose. He knew where he was going," Venediktov told reporters.
The Investigative Committee, deals with high-profile crimes, said it is treating Monday's attack as an attempted murder. The spokesman for the Russian Prosecutor General's Office described the attack as "outrageous" and said its prosecutors will investigate the case closely.