A man who murdered 12 people at a university in Azerbaijan before killing himself left behind messages saying he would "experience the pleasure of killing," police and prosecutors said Saturday, according to Agence France-Presse.

Twenty-nine-year-old Farda Gadirov was from neighboring Georgia and called himself a “lone wolf” in a message he left on his cell phone before the April 30 massacre, the AFP reported.

In addition to the dozen he killed, Gadirov also wounded another 13 during his rampage and only killing himself after police had surrounded the building.

“I am coming to Baku, I will shoot everyone I meet regardless of their age. I will not give up to the police. I will experience the pleasure of killing,” his message said, according to the AFP.

Investigators found photographs at his home in Georgia that showed him posing with a pistol. The pictures were signed “Lone Wolf” and “My every step is death”.

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