Downloading http://mirror.yandex.ru/debian/dists/wheezy/InRelease...
Downloading http://mirror.yandex.ru/debian/dists/wheezy/Release...
Downloading http://mirror.yandex.ru/debian/dists/wheezy/Release.gpg...

gpgv:  RSA key ID 46925553

gpgv:  RSA key ID 2B90D010

gpgv:  RSA key ID 65FFB764

ERROR: unable to fetch mirror: verification of detached signature failed: exit status 2