Lebanon's Hezbollah said it would be fully prepared to take action against Israel to support the Palestinians in the Gaza Strip when the time is right.
During a solidarity rally in Beirut, Hezbollah deputy chief Naim Qassem said: "We, as Hezbollah, are contributing to the confrontation and will (continue) to contribute to it within our vision and plan."
"We are fully prepared, and when the time comes for action, we will take it," he said, adding: "We will contribute to the confrontation within our plan... when the time comes for any action, we will carry it out."
Outreach by "major countries, Arab countries, and envoys from the United Nations, directly and indirectly, asking us not to interfere in the battle, will not affect us," he said, adding: "Hezbollah knows its duties."
On Friday, over a thousand participants joined Beirut's southern suburbs' rally to support Gaza, carrying Palestinian flags and solidarity banners.
Najwa Ali, a Palestinian refugee born in Beirut 57 years ago, participated in the solidarity rally.
"I have never seen Palestine, but when I go back one day, it will be with my head held high, without an Israeli soldier telling me where to go or what to do," she told AFP.
She indicated that the Israelis attacked and expelled her ancestors from Palestine in 1948, asserting that "blood will not stop flowing until we regain Palestine."
Fatima, 25, stresses that the Lebanese will not push towards war, but it will break out if Israel invades Gaza.
Hundreds gathered in various cities and villages across Lebanon and Palestinian refugee camps to support Gaza and protest the Israeli atrocities.
So far, Hezbollah has made limited moves in the war, but analysts believe it may be forced to open a new front if Israel launches a ground attack on Gaza.
Israel has been targeting Lebanese areas daily, and Hezbollah has targeted Israeli sites in a disputed border area since Sunday.
Despite the exchange of bombings that raised the tension at the border, Hezbollah's direct intervention remains limited.
A balance of deterrence has prevailed between the two sides since the 2006 war, which left more than 1,200 dead on the Lebanese side, mostly civilians, and 160 dead on the Israeli side, mainly from the military.