Russian serial killer strikes again .
MOSCOW 1996-08-27
Russian police in the Urals city of Perm are on the trail of a serial killer who has claimed his seventh victim in just a few months , Itar-Tass news agency said on Tuesday .
In the latest attack , the killer raped and stabbed a young woman in a lift , leaving her body on a landing .
Tass did not say exactly when it took place .
Police earlier released a suspect after women who had survived an attack failed to identify him .