Teens held over street assaults
Two teenagers and a man are being held on suspicion of robbery, attempted robbery and assault after three people were attacked over a half-hour period.
Police said a 43-year-old man needed hospital treatment for a head injury after being robbed on Upper Promenade in Colwyn Bay on Wednesday evening.
A man and a woman were attacked on a nearby footbridge later.
Police another incident then took place a few minutes later in which a teenager was assaulted.
The police helicopter was called in after the first assault, outside the Bell Hotel at around 1819 GMT, whose victim was taken to Ysbyty Glan Clwyd, Bodelwyddan, but released later.
A 51-year-old woman suffered facial injuries in the assault on her and a 37-year-old man on a footbridge over the A55 and a railway.
An 18-year-old man assaulted just over half a mile away when walking along Oak Drive had minor injuries and did not need hospital treatment.
Detectives said a 19-year-old man was arrested in the town on Wednesday night.
A 21-year-old man and a 17-year-old were held on Thursday morning.
North Wales Police said a high police presence would remain in the area in an effort to provide reassurance to residents.