Yahya al-Sinwar has been appointed as the new head of Hamas following the assassination of Ismail Haniya.
Sinwar's leadership is expected to escalate the ongoing conflict in Gaza.
The U.S. is increasing military presence in the Middle East amid tensions with Iran and potential retaliation.
The appointment has drawn criticism from Israeli officials, who view Sinwar as a significant threat.
Iran's response to the assassination of Haniya is anticipated, raising concerns about further conflict.