Hamas said Trump's threats would encourage Israel to ignore the deal, which largely halted more than 15 months of war in Gaza between Israel and Palestinian militants.
Foreign ministers from the 57-member Organisation for Islamic Cooperation (OIC) will meet at its headquarters in Jeddah, Saudi Arabia, three days after the Arab League endorsed Egypt's alternative plan for Gaza.
In the midst of the Israel-Hamas war, a young Israeli soldier, held captive for over a year, surprises the world by kissing the foreheads of his captors before his release.
Nasrallah's death nearly five months ago in a huge Israeli strike on Beirut's southern suburbs left Hezbollah supporters in disbelief and sent shockwaves across Lebanon and the region.
Norway-based Iran Human Rights (IHR) and French group Together Against the Death Penalty (ECPM) said the figure was the highest since IHR began recording executions in Iran in 2008.
US President Donald Trump's forceful backing of ally Israel has put the ceasefire under strain, and particularly his proposal to take over the Gaza Strip and remove its Palestinian inhabitants.
