GAZA/JERUSALEM, Oct 26 (Reuters) - Israel bombarded Hamas targets as it prepared for a ground invasion, with Russia warning the conflict could spread beyond the Middle East, and as world powers failed to secure plans to deliver critical humanitarian aid to the besieged Gaza Strip.

U.S. President Joe Biden, in remarks looking beyond the war that began with an Oct. 7 attack on Israel by Palestinian Hamas militants, said on Wednesday that the future should include Israeli and Palestinian states side by side.

"Israelis and Palestinians equally deserve to live side by side in safety, dignity and in peace," Biden said at a joint press conference in Washington with visiting Australian Prime Minister Anthony Albanese.

Biden said he believed one reason the Islamist Hamas group attacked southern Israel, killing 1,400 people and taking more than 200 hostages of different nationalities, was to prevent normalising relations between Israel and Saudi Arabia.

Russian President Vladimir Putin warned the conflict could spread beyond the Middle East and said it was wrong that innocent women, children and old people in Gaza were being punished for other people's crimes.

"Our task today, our main task, is to stop the bloodshed and violence," said Putin in a meeting with Russian religious leaders of different faiths, according to a Kremlin transcript.

"Otherwise, further escalation of the crisis is fraught with grave and extremely dangerous and destructive consequences. And not only for the Middle East region. It could spill over far beyond the borders of the Middle East."

Photo from Reuters