A TERRIFIED homeowner was approached by a masked man who grabbed him before making off.
Police said they also believed the attacker was in possession of a weapon.
The man had his face covered when he struck at an address in Portsmouth Road, Penyywell, at about 6.30pm on Tuesday.
His victim – a man in his 30s – was in an outhouse attached to his home – when the attacker approached and grabbed him by his clothing. He did not assault him or speak, and then fled without stealing anything.
Police have carried out house-to-house inquiries in the area.
Detective Sergeant Simon Auty said: “Inquiries are in the very early stages, and we’re doing everything possible to establish the circumstances and find the person responsible. Thankfully, no-one was injured, but obviously the victim and others present at the scene were left shocked by the incident.
Anyone with information is asked to contact police on 101 ext 69191, quoting log number, 990 12/11/13, or Crimestoppers anonymously on 0800 555 111.