WASHINGTON 

The US is "deeply saddened and disturbed" by the killing of Rohingya Muslim advocate Mohib Ullah, Secretary of State Antony Blinken said Thursday. 

"Ullah was a brave and fierce advocate for the human rights of Rohingya Muslims around the world," Blinken said in a statement.

The 48-year-old, a leader of the Rohingya Muslim community, was shot and killed by unidentified gunmen in a refugee camp in Bangladesh on Wednesday.

"We urge a full and transparent investigation into his death with the goal of holding the perpetrators of this heinous crime accountable," said Blinken.

The top diplomat said the US will honor his work "by continuing to advocate for Rohingya and lift up the voices of members of the community in decisions about their future."