estaban ocultando
Imperfecto progresivo para el sujetoellos/ellas/ustedesdel verboocultar.

ocultar

Los rastreamos hasta un granero donde parecía que se estaban ocultando.
We tracked 'em to a barn where it looks like they were hiding.
Abajo se observa una de las tomas aereas, donde se ven varias naves industriales, donde se estaban ocultando los misiles nucleares.
Meaning by letter. Below is a look at one of the aerial shots, which are several industrial plants, where they were hiding nuclear missiles.
Palabra del día
aterrador