Presidential candidates voiced grief and shock after a reporter and cameraman were fatally shot during a live television interview Wednesday morning in Virginia.

The victims were identified as reporter Alison Parker and WDBJ colleague Adam Ward, the cameraman.

Here are the candidates' reactions on Twitter:

Retired neurosurgeon Ben Carson:

Former Arkansas Gov. Mike Huckabee:

Former Secretary of State Hillary Clinton:

Former Fla. Gov. Jeb Bush:

Former Maryland Gov. Martin O'Malley:

South Carolina Sen. Lindsey Graham:

Wisconsin Gov. Scott Walker: