"The declaration on the state of emergency enables the IDF (Israeli military) to issue instructions to the citizens of Israel, including limiting gatherings and closing sites where it may be relevant," Gallant said, in a statement issued by his office.

"I am convinced that there is a high probability of an attack against the civilian population in areas of the country where the declaration of a special situation did not apply," he said, referring to previous local emergency measures.

"I hereby declare a special situation on the home front in other areas of the country. The situation is valid for 48 hours starting at 6:00 am," Gallant said.

In a separate statement, the defence ministry said Gallant briefed US Secretary of Defence Lloyd Austin on the overall situation.

"We have conducted precise strikes in Lebanon in order to thwart an imminent threat against the citizens of Israel," Gallant told Austin, according to the statement.

"We are closely following developments in Beirut, and we are determined to use all the means at our disposal in order to defend our citizens."

The statement also said that the two leaders "discussed the importance of avoiding regional escalation".