An emergency meeting of Arab and Islamic states is taking place in Qatar in response to Israel's air strike on Hamas leaders in Doha last week.
A draft resolution seen by the Reuters news agency condemns what it calls Israel's 'hostile acts including genocide, ethnic cleansing, [and] starvation', which it says threatens 'prospects of peace and coexistence'. Israel has strongly denied such allegations.
It is not clear what practical decisions could be taken, as analysts say any kind of military response is out of the question.
Earlier, Qatari Prime Minister Mohammed bin Abdulrahman bin Jassim al-Thani urged the international community to stop applying 'double standards' and to punish Israel.
On Sunday, US President Donald Trump stated that 'Qatar has been a very great ally' and emphasized that parties must be careful when engaging in military actions.
The probe into the Israeli strike revealed that it resulted in the deaths of several Hamas officials, including the son of chief negotiator Khalil al-Hayya, along with a Qatari security officer.
Qatar has historically played a pivotal role in mediating between Hamas and Israel, hosting the Hamas political bureau since 2012.