A Pennsylvania man who started a 2014 house fire that killed six people, including four young children, has been sentenced to life in prison without parole.

Twenty-six-year-old McKeesport resident Ryan Williams was sentenced Thursday to a mandatory two life terms.

Williams told the judge he wishes he would have burned in the fire that night, and he's sorry for what he did.

Prosecutors say Williams was set on revenge when he broke into Keith Egenlauf's McKeesport home Oct. 18, 2014, and tossed a burning toilet paper roll on a couch.

They say Williams believed Egenlauf was to blame for Williams being recently jailed.

Egenlauf was critically burned. His 55-year-old father, 27-year-old wife and her four children died.

Prosecutors had initially sought the death penalty.