Early Saturday evening, some sad news was reported out of Washington, as the sister of Celtics' All-Star point guard Isaiah Thomas has died following a car accident. Via KIRO7.com:

The Tacoma woman who died in a one-car accident on Interstate 5 in Federal Way Saturday morning is Chyna J. Thomas, 22, the sister of NBA star Isaiah Thomas, according to family friends.

Chyna Thomas died at the scene of the accident on the shoulder of I-5, according to the Washington State Patrol who identified her.

The wreck occurred around 5 a.m. on southbound Interstate 5 near South 288th Street, according to the Washington State Patrol.

Thomas and the Celtics are scheduled to play Game 1 of their first-round series against the Chicago Bulls Sunday at 6:30 p.m. ET in Boston. 

According to a league source, Thomas did not find out until after practice.  

There has been no update on Thomas' status for Game 1.