Protesters have scaled the roof of a Wrexham chemical factory.
Palestine Action campaigners climbed onto the roof of the Solvay factory on Wrexham Industrial Estate on Monday morning, as part of a demonstration against the supply of materials for use in drones.
The group said they had also daubed red paint on the factory.
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A representative of the group said: "The Welsh Underground Network applauds and supports all involved in the occupation of this factory.
"Action like this is critical to ending the apartheid regime in occupied Palestine. We call on all comrades to come together to support this action and investigate similar businesses who support the Israeli regime to also take action against."
A Palestine Action spokesman claimed: "There is damning evidence of Solvay's involvement in the Israeli settler colonial regime and its multifaceted violence and oppression against the Palestinian people.
"Companies such as Elbit and Solvay are not limited to oppressing the Palestinian people, but are also profitting from the surveillance of vulnerable migrants making life or death crossings at the sites of various border regimes.
"We will continue to take action against those who seek to profit from the suffering of people in Palestine and across the globe, we will continue until we have shut Elbit down for good.'
A spokesperson for the company has said: "At this stage we can only say that we are taking this potentially malicious act seriously and are very concerned about the safety of the protesters on the roof. Solvay is investigating the matter and will issue a statement in due course."
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