Flavor Flav has been arrested on suspicion of assault with a deadly weapon.

The rapper and reality TV star was detained by officers in Las Vegas in the early hours of this morning after allegedly threatening his fiancee's teenage son with a knife. Reports say Flavor - real name William Drayton Jr. - got into a physical argument with his partner, Liz, who then called emergency services after her son stepped in.

"The caller advised she had been involved in a physical altercation with her fiance, who was identified as William Drayton," a police statement said.

The "911 is a Joke" rapper was taken from the house, in a residential neighborhood several miles southwest of the Las Vegas Strip, into police custody at around 3am. Flavor is now being held on $23,000 bail at Clark County jail, with an initial court appearance scheduled for tomorrow. It is not clear if he has a lawyer.