Anti-Israel protesters took to the streets of Gaza as part of a wave of demonstrations marking the Palestinian solidarity Al-Quds Day.
Quds is the Arabic name for Jerusalem, Islam’s third holiest city after Mecca and Medina in Saudi Arabia.
Regional power bloc the Arab League called for Arab and Islamic backing of the Palestinian cause.
The leader of Lebanese Shi’ite militant group Hezbollah used a speech marking the day to caution Israel that any attack on Lebanon would be met with a fierce response.
General Sayyed Hasan Nasrallah warned that tens of thousands of Israelis would be killed by precision-guided missiles.
Referring to Israel’s threats to attack Iranian nuclear facilities, Nasrallah said Tehran’s response would be devastating.
Iran’s president Mahmoud Ahmadinejad joined the Palestinian solidarity demonstrations in Tehran, promising a “new Middle East” with no “trace of Americans or Israelis”.
With increasing rhetoric against their country and continued worries over Iran’s nuclear programme, which Tehran insists is for peaceful purposes, some Israelis are preparing themselves in case the situation boils over into military conflict.