Encerraron
Encerraron is a Spanish verb form. It is the third-person plural preterite indicative of the verb encerrar. Encerrar means to lock up, to shut in, to enclose, or to confine. Therefore, "encerraron" translates to "they locked up," "they shut in," "they enclosed," or "they confined."
This verb form is used in sentences to describe an action that was completed in the past