MONTERREY, Mexico -- Police in Mexico have captured an alleged member of the Zetas drug cartel considered the mastermind behind a casino fire that killed 52 people in the northern city of Monterrey.

Nuevo Leon security spokesman Jorge Domene says Baltazar Saucedo Estrada is a main hitman that was sought on a 15 million-peso reward because of the casino attack.

Domene said Friday 38-year-old Saucedo was detained in Monterrey because he looked suspicious.

On Thursday, police ordered him and another man to stop their vehicle. They gave chase, and crashed into a car. Also known as "mataperros," or dog killer, Saucedo was identified hours later as he was being processed.

Authorities have arrested 17 of 32 suspects in the Aug. 25 casino arson.