Activists have scaled the roof of a weapons factory in Glasgow forcing the building to evacuate.
Protesters from Palestine Action Scotland have occupied the site just near Queen Elizabeth University Hospital in Govan since the early hours of Wednesday morning.
Workers have been evacuated from the factory and equipment and facilities have also been destroyed by the group.
Thales is one the world's largest arms companies and produces military drones, armoured vehicles, and missile systems.
The French owned business has eight sites in the UK, including Glasgow.
The shut down of Thales in Glasgow is the first protest activity undertaken by Palestine Action Scotland.
A Palestine Action Scotland spokesperson said: "Palestine Action Scotland activists took to the roof of weapons company Thales’ Glasgow factory.
"A team of six activists scaled the site in the early hours of the morning and are currently occupying the building, rendering it unusable and forcing workers to evacuate.
"Inside the factory they have dismantled and destroyed factory equipment and facilities.
"Thales is one of the world’s largest arms companies – producing armoured vehicles, missile systems and military drones."
A Police Scotland spokesperson said: “Around 6.25am on Wednesday, police were called to a report of a demonstration within the grounds of a business premises in Linthouse Road, Govan, Glasgow. Officers remain at the scene.
“Police Scotland is a rights-based organisation that puts our values of integrity, fairness, respect and a commitment to upholding human rights at the heart of everything we do. We have a duty under the European Convention on Human Rights to protect the rights of people who wish to peacefully protest or counter protest balanced against the rights of the wider community.”
A Thales spokesperson said: “We can confirm we are working with the police to resolve this incident at our Glasgow site. The safety of our employees remains our primary concern at this time.
“The defence sector is proud to support our Armed Forces and security services with the equipment they need to protect our national security.
“Defence companies in Scotland and across the UK provide thousands of rewarding, high value, and long-term jobs. The sector works within UK ethical and transparency standards that are among the most robust of any country in the world.”
“The UK defence and security industry works within robust ethical standards that are among the highest found anywhere in the world, and treats its responsibilities under the law with the utmost seriousness.”