Militants in Nigeria’s Niger Delta region said that they have blown up two key oil pipelines in the region operated by Shell and the Italian group Agip.

The Movement for the Emancipation of the Niger Delta (Mend) said in a statement that it blew up the pipelines in a pre-dawn attack in Bayelsa state as part of a campaign to cripple the Nigerian industry, AFP wrote.

“The Agip pipeline that connects the Agip Brass terminal was sabotaged at Nembe creek, while the Shell Nembe creek line was done at Asawo village, all in Bayelsa state,” the militants said.

Shell and Agip provided no comment to AFP.

The attack is the seventh in a series of attacks on oil installations in just less than two weeks since the Nigerian Government extended an amnesty offer aimed at ending a three-and-half-year insurgency.