Ivanka Trump Ivana (Ivanka) Marie TrumpTrump luxury properties have charged US government .1M since inauguration: report Ivana Trump: Ivanka could 'definitely' be first female president The Hill's 12:30 Report - Presented by Facebook - Trump's West Coast campaign swing MORE expressed her condolences for the victims and families affected by the mass shooting in Florida on Wednesday, saying she was "praying" for the high school students that were killed and wounded.

"Praying for the innocent lives lost, their families and the Parkland, Florida community in the wake of today’s unspeakable tragedy," the first daughter tweeted.

Praying for the innocent lives lost, their families and the Parkland, Florida community in the wake of today’s unspeakable tragedy. — Ivanka Trump (@IvankaTrump) February 15, 2018

Authorities reported that 17 people were killed in the shooting at Marjory Stoneman Douglas High on Wednesday after a sole gunman, suspected to be a former student, opened fire.

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Trump's tweet comes after her father, President Trump Donald John TrumpObama calls on Senate not to fill Ginsburg's vacancy until after election Planned Parenthood: 'The fate of our rights' depends on Ginsburg replacement Progressive group to spend M in ad campaign on Supreme Court vacancy MORE, tweeted that he was in contact with Florida authorities after the shooting, including Gov. Rick Scott (R).

"My prayers and condolences to the families of the victims of the terrible Florida shooting. No child, teacher or anyone else should ever feel unsafe in an American school," the president said.

The White House canceled its daily press briefing following the shooting, as authorities evacuated the school and secured the area.

Police have the suspect, 19-year-old Nikolas Cruz, in custody. Between 20 and 50 others are believed to have been injured in the attack.