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: