The children's mother is expected to undergo a mental health exam

By Char Adams
March 18, 2016 01:00 PM

Texas police say that a renowned Ukranian pianist is not a suspect in the deaths of his two young children and the stabbing of his estranged wife outside of Dallas, Texas, PEOPLE has learned.

Police say it was Vadym Kholodenko who called police after he found his wife, Sofy Tsygankova, suffering multiple stab wounds and his daughters, Nika Kholodenko, 5, and 1-year-old Michela Kholodenko dead in their beds Thursday morning.

“He had an appointment to pick up the children at 9:20 a.m., which was the normal practice arranged between both parents,” police tell PEOPLE in a statement. “He has been cooperative in this investigation and is not considered a suspect at this time.”

Officers went to the Benbrook home at around 9:30 a.m., and found the victims.

Police did not initially identify Kholodenko as the caller, but now say it was the pianist who alerted authorities.

Vadym Kholodenko
Rodger Mallison/Fort Worth Star-Telegram/MCT

Now, authorities say that 31-year-old Tsygankova, is facing a mental health exam, the Associated Press reports. Officials did not say whether the mother is a suspect in the deaths.

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Although the Tarrant County medical examiner’s office have not yet determined a cause of death, KXAS-TV reports that the girls had no visible injuries.

Police have not identified a suspect. The incident is being investigated as a double homicide and aggravated assault.

Kholodenko and Tsygankova married in 2010, but filed for divorce and have not lived together since last year, the Fort Worth Star-Telegram reports.

The internationally-known pianist lives in the Dallas-Fort Worth area and was expected to perform three shows with the Fort Worth Symphony Orchestra this weekend.