A woman weeps as she is reunited with her husband, one of hundreds of Navy Yard workers evacuated to a makeshift Red Cross shelter after a mass shooting at the naval installation in Washington on Sept. 16.  (Jonathan Ernst/Reuters)

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.

"In light of today’s tragic shooting at the Navy Yard in Washington, D.C., tomorrow’s hearing on stand your ground laws has been postponed to a later date," Durbin spokesman Max Gleischman said in a statement.

Witnesses who were set to testify included Martin's mother, Sybrina Fulton.

Durbin is chairman of the Senate Judiciary Subcommittee on the Constitution, Civil Rights and Human Rights.