The United Nations says it will summon more Syrian officials for questioning in its probe of the assassination of former Lebanese Prime Minister Rafik al-Hariri.

In an interview with Lebanon's newspaper, which is owned by the Hariri family, U.N. chief investigator Detlev Mehlis says he will ask permission from Syria in the next few days to question more officials about the assassination. He did not specify which officials he wants to question.

UN Targets More Syrians in Hariri Assassination Probe

International investigators interrogated five Syrian officials in the Austrian capital, Vienna, this week in connection with the February 14 truck bomb that killed Mr. Hariri and 22 others.

UN Targets More Syrians in Hariri Assassination Probe

Mr. Mehlis said the Vienna interviews were more fruitful than a series of earlier interrogation sessions in Damascus.

UN Targets More Syrians in Hariri Assassination Probe

In an interim report in October, the U.N. investigator implicated senior Syrian security officials and their Lebanese allies in the murder.