The arrest of Carlos Oliva Castillo in Saltillo, the capital of the northern state of Coahuila, set off hours of running gun battles as underlings tried to free the man they call La Rana, or "The Frog," army spokesman Ricardo Trevilla said.
The only Zeta leaders above Oliva Castillo, Trevilla said, are two former members of an elite army special forces unit trained to combat drug cartels, Heriberto Lazcano Lazcano and Miguel Angel Trevino Morales. Each carries a $5 million U.S. government bounty and a $2 million Mexican reward.
An army statement said intelligence work had led to a safe house in Saltillo, 250 miles from the Texas border. Soldiers stormed the house Wednesday and arrested Oliva Castillo without firing a shot, it said. But Zeta gunmen later attacked army troops in an effort to rescue Oliva Castillo, Trevilla s
