Around 20 Greenpeace activists have blocked access to a shale gas exploration site in Romania, in a third attempt to scupper the drilling operations of US energy group Chevron.
Protesters locked hands and sat in front of the entrance to a drilling position in the northeastern village of Pungesti yesterday.
They prevented a lorry from entering and displayed banners reading "No to fracking".
Fracking is a controversial extraction technique that consists of injecting water and chemicals deep into rock to release gas.