An armed group in Libya has shut down a comic book convention in the capital Tripoli because it breached the country's "morals and modesty".

Special Deterrent Forces (SDF) said they had arrested organisers of the Comic Con convention.

It said on its Facebook page that photos published on social media from the convention caused "a widespread public outpouring of criticism".

The SDF is loyal to the UN-backed Government of National Accord.

Hundreds of young Libyans attended Tripoli's second Comic Con festival on Friday, some dressed up as characters from American and Japanese comics.