Families of Israeli hostages are among the tens of thousands of people who've gathered at a public plaza in Tel Aviv - waiting for their release.

The second scheduled transfer of hostages was delayed while Hamas waited for Israel to allow aid trucks into Gaza.

Save the Children advocacy director Jacqui Southey says humanitarian organisations are working to ensure supplies are sent to Gaza to mitigate the damage. 

"This is a complicated situation, more than 70 percent of Gaza's population have been displaced and are sheltering out of their homes. Many of them are in overcrowded shelters, trying to make do."

LISTEN ABOVE

• Tense wait for Hamas to release more hostages
• Qatar says Gaza ceasefire will begin today, with hostage releases to follow
• Israeli official says talks continuing, hostage release won't take place before Friday