Police are appealing for witnesses after a man repeatedly threatened two men as they walked through Cinderford town centre.
A man, who was on his own, followed the two men for 20 minutes, repeatedly threatening to stab them with a knife.
He was described as being a white man, 5ft 9in in height, and wearing a black jacket and grey jeans.
The incident happened on Cinderford High Street between 10pm and 11pm on Sunday 31 July.
A man in his 40s, and from the Forest of Dean, was arrested on suspicion of possessing a bladed article. He has been released under investigation pending further enquiries.
Officers would like to speak to anybody who saw anything suspicious in Cinderford High Street at that time.
Anyone with information is asked to contact Gloucestershire Constabulary through the website, quoting incident 490 of 31 July: https://www.gloucestershire.police.uk/contact/af/contact-us/
Alternatively you can call police on 101, phone Crimestoppers anonymously on 0800 555 111 or visit their website https://crimestoppers-uk.org
