Saleh Arouri, who is believed to be a top target for Israeli assassination, is said to be particularly worried about the security breach.
Hamas’s collaboration with Iran and Hezbollah has angered Qatar, which supports Syrian rebel groups and opposes Syria’s return to the Arab League.
Saleh Arouri wants Hamas to work more with Iran.
In recent years, Arouri headed a body known as the “West Bank Headquarters” that is responsible for terrorist activities in Judea and Samaria.
A Hamas delegation, led by senior Hamas official Saleh Arouri, met in Beirut on Monday with Hezbollah leader Hassan Nasrallah.