A Senate hearing on so-called "stand your ground" laws set for Tuesday has been postponed in light of the shootings in Washington, D.C., on Monday, Sen. Dick Durbin (D-Ill.) has announced.

The hearing was being held in response to concerns about "stand your ground" laws following the not guilty verdict in the trial of George Zimmerman, who killed Florida teenager Trayvon Martin. Such laws allow people who feel threatened to respond with deadly force.