Condition Improves for 1 Triplet in NJ Bus Crash

Feb. 16, 2012: A school bus carrying elementary school students collided with a dump truck in Chesterfield, N.J. NBC10.com/Tim Furlong

Hospital officials in New Jersey say the condition of one of the sisters of an 11-year-old triplet killed in a school bus crash has improved.

A spokeswoman for Cooper University Hospital in Camden says Natalie Tezsla's condition has been upgraded to stable, from critical. But her sister Sophie Tezsla remains in critical condition, as does a third student.

The girls are the daughters of a New Jersey state trooper.

The crash Thursday in the town of Chesterfield, south of Trenton, killed the Tezslas' other sister - Isabelle.

9 year old Anthony Varga, Jr. talks about what he saw and heard in a deadly school bus accident in Chesterfield Township, New Jersey. (Published Thursday, Feb. 16, 2012)

The accident occurred when a dump truck collided with the school bus, which was carrying 25 children to an elementary school. An investigation into the cause continues and no charges have been filed.