Armed police were called to a busy road in Cardiff after reports of a group of men carrying a machete.
A large police presence, including armed officers, was reported on Greenway Road in Rumney on Tuesday morning.
Following a local search, a 27-year-old man has been taken into custody and enquiries are continuing. Nobody is thought to have been injured in the incident.
Reports on social media described a "massive police presence" on Greenway Road and also said armed officers were seen on nearby Hendre Road.
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A spokesperson for South Wales Police said armed police were deployed "as a precaution".
They said: "At around 10.35am today a report was received of a group of three young men in possession of a machete on Greenway Road in the Rumney area.
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"Officers were deployed to the area, supported by specialist armed police as a precautionary measure.
"Following a localised search, a 27-year-old local man has been taken into custody and enquiries are continuing.
"Anyone with any information is asked to contact South Wales Police on 101 or Crimestoppers anonymously on 0800 555111 and quote reference 2100012548."
