 Montoneros' leadership dismissed the tactics of the ERP in Tucumán as "old fashioned" and "inappropriate" but still sent reinforcements.On 26 October 1975 five policemen (Pedro Dettle, Juan Ramón Costa, Carlos Livio Cejas, Cleofás Galeano and Juan Fernández) were killed in Buenos Aires when Montoneros guerrillas ambushed their patrol cars near the San Isidro Cathedral.Two of the captured policemen were reported to have been executed in this operation under the orders of the Montoneros commander Eduardo Pereyra Rossi (nom de guerre Carlon).