A motorcycle accident Friday night left a 29-year-old woman dead and a 37-year-old man in serious condition, according to police.

Sinead M. Lovett, a preschool teacher from Braintree, was thrown from the motorcycle as Richard Migliacci, of Somerville, swerved around traffic, witnesses said.

According to Somerville and State police, the motorcycle crashed into the curb on Route 28 South near Mystic Avenue causing also causing Migliacci to be thrown from the bike.

Both victims were transported to the Massachusetts General Hospital where Lovett was pronounced dead and Migliacci remains in serious condition.