Russian authorities have identified the second suicide bomber in last week's fatal Moscow subway attacks as a 28-year-old honors graduate from a Dagestan university, Russian news agencies reported Tuesday.
Mariam Sharipova, a Dagestan native, graduated from the Physics and Mathematics department of Dagestan State University in 2005, the Interfax news agency said, citing Vladimir Markin, an official with the Investigative Committee of the Russian Prosecutor's Office.
It said she was responsible for the bombing at the Lubyanka station, one of two blasts that killed a total of 40 people during the morning rush hour March 29.
Markin told Interfax that Sharipova was a native of the village of Balakhani in Dagestan, a predominantly Muslim republic in southern Russia that has faced separatist violence for years.
Recently, Sharipova had been teaching computer science at a local school, the state-run RIA-Novosti news agency reported.
Russian newspaper Novaya Gazeta reported Monday that Sharipova's father recognized his daughter in a photo on the Internet of one of the suicide bombers and contacted police, RIA-Novosti said.
"My wife and I recognized our daughter immediately," the father told the paper, adding that he and his wife hadn't known their daughter's whereabouts for several days.
Friday, the Russian Investigative Committee identified the first bomber as fellow Dagestan native Dzhennet Abdullayeva, whose precise age wasn't revealed but who was born in 1992.
A number of Russian newspapers reported Friday that Abdullayeva - whose last name has also been cited as Abdurakhmanova - was the widow of a prominent Dagestani rebel militant leader who was killed by federal forces in late December.
An apparent photograph of Abdullayeva and her late husband, identified as 30-year-old Umalat Magomedov, was published in Russian media. It shows a bearded man with his arm draped over a young-looking teenage girl dressed in traditional Muslim attire. Both are holding guns and looking unsmilingly into the camera.
The circumstances of the photograph, including when it was taken, were not explained. CNN could not confirm the authenticity of the picture.
Both female bombers detonated their explosives about 40 minutes apart at the Lubyanka and Park Kultury stations in central Moscow, beginning just before 8 a.m. when half a million people were riding trains in the capital.