Gunmen opened fire on a group of people who had stayed behind.
The move marks a seismic change in the country's political landscape after a federal election that saw Labor win a second term.
"It's unlikely that the military aspect even arose during the two-hour conversation between the presidents."
The top defense official emphasized that Russian forces must withdraw from Ukrainian territory immediately following a ceasefire.
The signing followed a unanimous passing of the Bill by both the Congress and the Senate.
The two leaders held a two-hour phone conversation on Monday.
Last year, Donald Trump promised he would end the Ukraine War in "24 hours".
No food, fuel or medicine had been allowed into Gaza since March 2.
The US President also said conditions for peace would need to be negotiated between the two parties.
