A bomb has exploded outside the headquarters of Lebanese Blom Bank in central Beirut, causing damage but no fatalities, the country's interior minister says.
There were no immediate claims of responsibility following Sunday's blast.
The Lebanese banking sector has been at the centre of an escalating crisis since the United States passed a law targeting the finances of Hezbollah. The powerful Shi'ite Muslim group has launched verbal attacks on the central bank over the implementation of the act in Lebanon.
Blom Bank is one of the banks that has closed accounts belonging to people suspected of links to Hezbollah.
There was not immediate comment from Hezbollah on the bomb blast.
News that makes sense
Your trusted source for staying up-to-date with the world around you. Get free daily news updates and analysis, straight to your inbox.
The Lebanese Red Cross said two people suffered minor injuries in the blast, which took place outside Blom Bank headquarters in the Verdun area of Beirut, the National News Agency reported.
Smoke rose from the area. Local television showed footage of a damaged building, with one hole in a concrete wall, and said shattered glass had fallen to the ground from several storeys up.
A security source said the bomb had contained 2kg of explosives. Interior Minister Nohad Machnouk said the device had been left in a bag by the back wall of the building.
"Politically it is clear that target was Blom Bank only," he said, adding that the attack had nothing to do with the militant group Islamic State, which has mounted suicide bombings in Beirut.
The last bomb attack to hit the Lebanese capital killed more than 40 people in the southern suburbs, an area where Hezbollah is dominant. That bombing was claimed by the Sunni Muslim Islamic State.
Heavily-armed, Iran-backed Hezbollah, which is classified as a terrorist group by the US, wields enormous political influence in Lebanon and its powerful military wing is playing a major role in backing President Bashar al-Assad in the Syrian conflict.
The US act passed in December, the Hezbollah International Financing Prevention Act, threatens to punish any organisation providing significant finance to Hezbollah.
It has ignited an unprecedented dispute between Hezbollah and a central bank widely seen as a pillar of the otherwise weak and dysfunctional Lebanese state.
The central bank has said the US law must be applied to avoid the international isolation of Lebanon's banking sector.
Hezbollah has strongly criticised the bank for agreeing to measures it deems as part of a war against it.
