“Our priority is to conduct activities in a safe and environmentally responsible manner consistent with the permits under which we operate,” Chevron said in a statement Saturday.

Chevron did not say when it will resume works.

Hydraulic fracturing, or fracking, consists of pumping a water-sand mixture into underground rock layers to free the trapped oil or gas. Villagers are worried that the technique would affect the environment.

Chevron has permits to explore for shale gas in three localities in Vaslui county. In early October, the company received authorization to drill its first well in Silistea. Works, which were to start immediately, were delayed by protests.

On December 2, Chevron said it resumed shale gas exploration at its field in Silistea-Pungesti.