estaban monitorizando
-they/you were monitoring
Imperfect progressive ellos/ellas/ustedes conjugation of monitorizar.

monitorizar

Los residentes y los miembros de la CPT que estaban monitorizando el desahucio sufrieron agresiones por resistir pacíficamente.
Residents and CPT's members who were monitoring the eviction suffered assaults for resisting peacefully.
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chimney