STOCKHOLM (AP) — Swedish authorities have charged five teenagers from Afghanistan with raping another Afghan boy in an alleged assault that prosecutors say lasted for at least an hour.

An indictment filed Tuesday alleges the teens dragged the victim into a forested area in the city of Uppsala, threatened him with a knife and sexually assaulted him.

Prosecutor Johan Stromback says the five suspects are 16 and 17 years old, while the boy they allegedly assaulted is under 15. Stromback says they all arrived in Sweden as unaccompanied minors seeking asylum.

According to the indictment, the accused allegedly filmed parts of the assault and threatened to post clips on social media, if the victim went to police.

The indictment says two suspects have acknowledged some allegations, but none has confessed to a criminal act.