A teenage boy required hospital treatment after a "brutal and frightening" attack by a gang of youths.
The 15-year-old was set upon by the group in Backie Road in Mayfield, Midlothian, at about 9.25pm on Friday August 4.
The boy was repeatedly kicked by his attackers, before one of them struck him with a bottle.
He suffered a serious facial injury in the incident.
He was taken to Edinburgh Royal Infirmary for treatment and was later discharged, although his wound will require further medical attention.
Police Scotland said the main suspect involved was a white youth, aged about 15 or 16 years old, about 5ft 10in and wearing a dark-coloured hooded top.
Detective Constable Lynn Myles of Dalkeith CID said: "This was a brutal and frightening attack, which has left a 15-year-old with significant injuries.
"We are eager to trace the youths responsible for this incident, particularly the male who used a bottle as part of the assault.
"I would ask anyone who saw this incident, or recognises the description of the suspect, to contact us as soon as possible.
"I would especially appeal anyone who may have filmed this incident on a mobile device to get in touch with us and let us see this evidence."
Anyone with information can contact police on 101.
Why are you making commenting on The Herald only available to subscribers?
It should have been a safe space for informed debate, somewhere for readers to discuss issues around the biggest stories of the day, but all too often the below the line comments on most websites have become bogged down by off-topic discussions and abuse.
heraldscotland.com is tackling this problem by allowing only subscribers to comment.
We are doing this to improve the experience for our loyal readers and we believe it will reduce the ability of trolls and troublemakers, who occasionally find their way onto our site, to abuse our journalists and readers. We also hope it will help the comments section fulfil its promise as a part of Scotland's conversation with itself.
We are lucky at The Herald. We are read by an informed, educated readership who can add their knowledge and insights to our stories.
That is invaluable.
We are making the subscriber-only change to support our valued readers, who tell us they don't want the site cluttered up with irrelevant comments, untruths and abuse.
In the past, the journalist’s job was to collect and distribute information to the audience. Technology means that readers can shape a discussion. We look forward to hearing from you on heraldscotland.com
Comments & Moderation
Readers’ comments: You are personally liable for the content of any comments you upload to this website, so please act responsibly. We do not pre-moderate or monitor readers’ comments appearing on our websites, but we do post-moderate in response to complaints we receive or otherwise when a potential problem comes to our attention. You can make a complaint by using the ‘report this post’ link . We may then apply our discretion under the user terms to amend or delete comments.
Post moderation is undertaken full-time 9am-6pm on weekdays, and on a part-time basis outwith those hours.
Read the rules here