Police suspect a gang of teenagers and young adults may be responsible for two late-night muggings, possibly involving an imitation handgun, in Newport.
A 60-year-old man in Shaftsbury Walk was threatened with the weapon by three people at around 2345 BST last Friday.
He refused to hand over his wallet and the trio ran off towards Albany Road.
Later, a man was approached by a group of about eight, males and females, and punched to the ground and hit in the face with the suspected handgun.
Gwent Police said the suspect in the first attack is described as Asian, aged 22-27 years, and around 5ft 8-10 inches (1.72-7m) tall and of slim build.
He had short dark hair and a local accent and was wearing a flat cap with a peak, a light-weight zipped jacket, a light coloured t-shirt and baggy jeans.
The group in the second incident, who stole their victim's mobile phone before making off to the city centre, were said to be aged between 15 and 20 years old.
Their victim was taken to the Royal Gwent Hospital for stitches to his lip.
Police said they were linking the two incidents and added that they the particularly wanted to speak to two people who stopped to help him.
Anyone with any information about these incidents is asked contact Gwent Police on 101 or call the independent charity Crimestoppers anonymously on 0800 555 111.