An armed man demanding deposits frozen by his bank took an unspecified number of hostages on Thursday at the Federal Bank of Lebanon, a security source said and a Reuters witness said.
Lebanese banks have limited withdrawals of hard currency for most depositors during the country's three-year financial meltdown, which has left more than three-quarters of the population poor.
The man entered the Federal Bank of Lebanon branch in the Hamra neighbourhood in west Beirut just before noon on Thursday with a firearm, the security source told Reuters.
Some customers in the bank managed to flee before he shut the doors on the rest, said the source, who was not able to specify how many clients or employees were in the branch.
Two shots were subsequently fired, according to Lebanese media station Al-Jadeed.
A Reuters witness could see a bearded man in a black shirt behind the gated entrance to the bank speaking to several men in plainclothes on the outside.
"Let them give me back my money!" he was heard telling them.
An Israeli airstrike killed at least 26 Palestinians, including children, in a house in Shejaia in Gaza City, local health authorities said on Wednesday.
President Volodymyr Zelenskyy said that Ukrainian forces had captured two Chinese men fighting for Russia in eastern Ukraine, potentially threatening a fragile peace effort in the three-year-old war.
As calls for Lebanon's Hezbollah to disarm gain momentum, a senior Hezbollah official told Reuters the group is ready to hold talks with the Lebanese president about its weapons if Israel withdraws from south Lebanon and stops its strikes.
Russian forces staged huge drone attacks on eastern Ukraine late on Tuesday, triggering fires and injuring at least 22 people, regional officials said.
United Nations Secretary-General Antonio Guterres has rejected a new Israeli proposal to control aid deliveries in Gaza, saying it risks "further controlling and callously limiting aid down to the last calorie and grain of flour".