CLOVIS, N.M. (AP) — Four jail inmates who authorities say helped eight others make a brazen escape were charged Wednesday, as officials kept up the search for the five prisoners who remain on the loose, including a convicted murderer.

Two people close to the fugitives were also arrested; authorities allege that they didn't cooperate with investigators.

Authorities believe it took the inmates seven hours to cut through the roof of the Curry County jail, apparently the culmination of a two- or three-day planning effort. Authorities did not immediately say how they think the six other people might have helped with the escape.

Authorities said the four inmates accused of helping, who were not among the escapees, face six charges each.