BAYOU CORNE (AP) — A well drilled to examine a failed salt cavern has penetrated the roof of the deep cavern to begin tests to learn whether its failure caused a huge sinkhole in Assumption Parish.

Sonny Cranch, a spokesman for Texas Brine Co. LLC of Houston, tells The Advocate the drill broke through at about 8 p.m. Saturday. He says tests did not find any pressure from gas or brine.

Cranch says diagnostic tests began almost at once, and results are expected in two to three days.