Authorities say they have arrested an Ashburn man they say assaulted his fiance and attacked her sister with a sword.

The Loudoun County sheriff's office says 27-year-old Richard V. Muse II has been charged with felony assault and domestic assault.

Deputies went to a home on Omeara Terrace early Monday for a report of a stabbing. They say Muse assaulted his 24-year-old fiance in a domestic dispute.

Sheriff spokesman Kraig Troxell says the woman's 28-year-old sister had arrived at the scene and Muse assaulted her with what's described as a samurai-style sword, nearly 6 feet long. She suffered injuries to her hand.

The sisters were treated and released from a hospital.