A man wielding a chainsaw sparked chaos by storming into a Russian cafe and threatening customers.
Footage posted online shows staff tackling the man, who was reportedly drunk, as he lurched around with the power tool in the far eastern port city of Nakhodka.
Screams and the sound of the chainsaw roaring can be heard in the video as at least four people grapple with the him and others flee.
Cafe employees and customers were able to wrestle the saw off the man and switch it off, according to local media reports. No one was hurt.
Police in the Primorsky region launched an investigation after the clip was widely shared on social media, according to Interfax news agency. The video was posted online this week, but it is not clear when it was filmed.
The Ministry of Internal Affairs said the incident had not been reported to the police but officers were looking to speak to witnesses.
Nakhodka, 90 miles east of China on the Sea of Japan, is a key route for Siberian coal exports. More than five per cent of the city's 160,000 residents are port workers.
