UN rights chief Navi Pillay on Thursday called for an “immediate investigation” into the circumstances surrounding the February death of an unarmed black US teen, shot by a neighborhood watchman.

Pillay made the comments about the controversial Trayvon Martin case at a press conference in Barbados, as she wrapped up a three-day visit to the Caribbean island nation.

“As High Commissioner for Human Rights, I call for an immediate investigation,” Pillay told reporters.

“Justice must be done for the victim. It’s not just this individual case. It calls into question the delivery of justice in all situations like this.”

Neighborhood watch captain George Zimmerman, a white Hispanic, fatally shot 17-year-old Martin inside a gated community in the Florida town of Sanford on February 26.

Zimmerman has said he acted in self-defense after Martin punched him in the nose, knocked him down and slammed his head into the ground.

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