Romania's former president says prosecutors are investigating threatening remarks he made to a senator while he was president.

In March, prosecutors began to investigate Traian Basescufor blackmail which carries a heavier penalty. He arrived at the prosecutor's office Wednesday where he was jeered by about 20 people.

Prosecutors are investigating remarks which Basescu made on April 14, 2014, to Sen. Gabriela Vranceanu-Firea, who had accused Basescu's elder daughter of fraud related to a property restitution case.

Basescu was recorded warning Vranceanu-Firea to "be careful," saying one day she might not find her husband at home. Basescu, who was president from 2004 to 2014, has not explained what he intended by those remarks.