MIAMI - South Florida authorities say they've arrested a man who attacked his ex-girlfriend and her family with a knife, killing two people.

The Miami-Dade Police Department reports that 29-year-old Joseph Teman Swift was arrested Tuesday morning. He was charged with two counts of first-degree murder and two counts of attempted murder.

Police say Swift went to the family's Miami home Sunday night and began stabbing his ex-girlfriend, 30-year-old Natasha Jones, and her family.

Her mother, 58-year-old Jenetha Jones, and her brother, 23-year-old Wade Jones, were pronounced dead at the scene.

Natasha Jones and her sister, 25-year-old Taree Jones, were airlifted to a local trauma center in critical but stable condition.

A toddler present during the attack was not harmed.

Swift is being held without bail. It wasn't immediately known if he had an attorney.