Israel stepped up airstrikes aimed at Hezbollah in Lebanon while continuing to deliberate how to retaliate against Iran for last week’s missile attack.

Bracing itself for a retaliatory strike for the ballistic missile attack, Iran has been urging its Arab neighbors not to allow Israel to use their airspace.

Humanitarian laws of war, including the Geneva Conventions, require military forces to give civilians ample warning to flee before attacking. Israel has issued evacuation alerts for large sections of south Lebanon, though, in some cases, it has given people as little as two hours to leave their homes before striking.

Israel has come under international criticism after United Nations peacekeepers were injured earlier this week in tank fire in southern Lebanon.