A report on the 2005 assassination of former Lebanese Prime Minister Rafik Hariri aired on Canadian television Monday "points overwhelmingly" to Hezbollah.
The CBC report cites evidence, including copies of mobile phone and other communications, that link Hezbollah operatives with Hariri's assassination.
The former prime minister and 22 others were killed when terrorists detonated a massive roadside bomb as his motorcade traveled along a main thoroughfare in Beirut.
A report in Germany's Der Spiegal in May 2009 implicated Hezbollah with two linked mobile phone networks used in the bombing.
The CBC report also presented evidence of collusion between Hezbollah and the late prime minister's chief of protocol, who serves today as Lebanon's chief of intelligence.
Hezbollah, now part of the Lebanese unity government, declined to comment on the CBC report.
UN special coordinator for Lebanon Michael Williams said he expects the tribunal to issue the indictments "in the coming months."
The interim report may be issued within two weeks.
Hezbollah spiritual leader Sheikh Hassan Nasrallah has said repeatedly that indicting any of its members would trigger massive protests in Beirut.
At the beginning of November, a report in the London-based daily Asharq Alawsat warned of a military coup by Hezbollah and two other groups - Amal and the Syrian Social Nationalist Party - would take place to "restore order" after the protests.
Meanwhile, Turkish Prime Minister Recep Tayyip Erdogan arrived in Beirut on Wednesday for a two-day visit to "fight signs of civil war."
"Now is the time for unity in Lebanon," Erdogan said.