Britain will contribute another 1 million pounds ($1.6 million ) to a U.N.-backed probe into the slaying of a former Lebanese prime minister Rafik Hariri.

This commitment brings Britain’s contribution to 2.3 million pounds ( $3.68 million) . The United States has contributed $30 million.

British Foreign Secretary William Hague urged other nations to support the court, saying justice “is the only way to ensure long term stability” in Lebanon.

The Special Tribunal for Lebanon ( STL) was established by the UN security council in 2007 to try the killers of Hariri, who was assassinated in a 2005 truck bombing in Beirut.