The family of two New York City siblings has confirmed that authorities confirmed they died in the terrorist bombings in Brussels.

Belgian authorities and the Dutch Embassy positively identified the remains of Alexander and Sascha Pinczowski.

The information was issued Friday by James Cain on behalf of the Pinczowski family. Cain is the father of Alexander's fiancé, Cameron Cain.

He says the family is "grateful to have closure on this tragic situation."

The siblings were on the phone with a relative at Brussels airport when the phone went dead.

They were Dutch nationals, according to officials in the Netherlands, but both apparently had lived in the U.S. for some time.