FORT WORTH, Texas -- A family that immigrated from Nepal for an opportunity at a "better life" is now devastated after three of their own died in a head-on collision Sunday night.

The Kami family says grandparents Damber and Pabitra, along with their infant granddaughter, Sharon, were all killed following a joyous evening of Christmas caroling with their church.

"It's very sad for us and very, very painful," said Laxu Man Kami, the couple's grown son.

The man said that his sister, along with another niece and nephew, remain hospitalized.

The sister is in critical condition. Sharon, the infant that passed away, was her other child.

"The doctor has told me she can't walk for life," said Laxu about his sister's condition.

Fort Worth police traffic investigators are still exploring why it appears the Kami's car traveled into an oncoming lane to hit a pickup truck.

"We're not exactly sure if they were trying to turn. Witnesses on scene said they veered into traffic," said Ofc. Tracy Carter, a department spokesman.

Blue Mound Road near Highway 287 was reopened early Monday morning.

Members of the family's Eternal Life Church, based in south Fort Worth, arrived by the van-load at the home on Monday afternoon to offer support.

Damber was a well-respected deacon.

"He's not only important to our church but very important in our community," said Pastor Raju Tamang. "For the family it is a whole loss, because he used to handle everything for the family."

Memorial service arrangements are pending.

A GoFund me page is expected to be set up shortly to help with costs.