TAKE TO THE STREETS, DEMANDING A CEASE-FIRE. GOOD EVENING, I'M JESSICA MOORE. WE BEGIN WITH THE BODIES OF SIX HOSTAGES FOUND IN GAZA. THE SIX PEOPLE KILLED INCLUDE ISRAELI AMERICAN HIRSCH GOLDBERG-POLAND. THE ISRAELI MILITARY SAID ALL SIX WERE MURDERED SHORTLY BEFORE THE IDF ARRIVED. FRUSTRATION AND ANGER NOW BOILING OVER IN ISRAEL. TENS OF THOUSANDS SURGED INTO THE STREETS THERE IN WHAT COULD BE THE LARGEST PROTEST SINCE THE START OF THE WAR. DEMONSTRATORS DEMANDING PRIME MINISTER BENJAMIN NETANYAHU REACH A CEASE-FIRE DEAL. NEWS OF THEIR DEATHS RESONATING IN OUR AREA. NEW YORKERS HELD VIGILS TODAY. HANNAH KLIGER IS LIVE FOR US IN STUDIO WITH MORE ON THAT. >> Reporter: THE ISRAELI MILITARY SAYS THE BODIES WERE FOUND IN AN UNDERGROUND TUNNEL. AMONG THEM, HIRSCH GOLDBERG-POLIN. AND THOSE STILL HELD CAPTIVE BY HAMAS. THEIR SUPPORTERS ATTENDED VIGILS AND RALLIES ACROSS THE CITY. OUTSIDE THE ISRAELI CONSULATE, DOZENS GATHERED TO REMEMBER THE SIX HOSTAGES WHO WERE IDENTIFIED. >> THE SIX PEOPLE WHO WERE BRUTALLY MURDERED WERE AS INNOCENT AS YOU AND I. WHAT DID THEY DO WRONG EXCEPT FOR THE FACT THAT THEY WERE JEWS? >> Reporter: THEIR PAIN ECHOED IN CENTRAL PARK WHERE THE HOSTAGE FAMILY'S FORUM HAVE BEEN RALLYING WEEKLY, CALLING FOR AN INCREASE IN EFFORTS TO BRING THEM HOME. >> WE HURT THE SAME WAY AS IF IT WERE MY OWN FAMILY. WE ARE ALL GRIEVING. IT'S GOING TO HAPPEN TO ALL THE FAMILIES, TO ALL THE HOSTAGES IF A DEAL IS NOT SEALED. >> Reporter: GUSTAVO IS THE COUSIN OF 40-YEAR-OLD CARMEL GAT. >> WE HAVE TO BRING THEM HOME NOW. DON'T STOP COMING TO THESE RALLIES. KEEP MARCHING. MAKE YOUR VOICE HEARD. TOO LATE FOR MY FAMILY, BUT THERE ARE OTHERS WHERE IT IS NOT TOO LATE FOR. >> Reporter: ONE OF THE MOST KNOWN IS23-YEAR-OLD HERSCH GOLDBERG-POLIN, AN AMERICAN ISRAELI CAPTURED FROM THE NOVA MUSIC FESTIVAL ON OCTOBER 7. HIS PARENTS ADDRESSED THE DNC LAST MONTH, SAYING THEY STILL HAD HOPE. >> ANYONE WHO IS A PARENT OR HAS HAD A PARENT CAN TRY TO IMAGINE THE ANGUISH AND MISERY THAT JOHN AND I AND ALL THE HOSTAGE FAMILIES ARE ENDURING. >> Reporter: GIDEON WITH THE CONSULATE GENERAL SAYS THIS HAPPENED NEAR THE LOCATION OF THE HOSTAGE RESCUE. >> JUST LAST WEEK WE RESCUED THE OTHER HOSTAGES AND THE LIFE. AND WHO HAVE BEEN RESCUED BY THE IDF SOLDIERS FROM THE TUNNELS. >> Reporter: PRESIDENT BIDEN SAID IN A STATEMENT HE IS DEVASTATED AND OUTRAGED. HE ALSO CALLED FOR AN END OF THE WAR AND EXPRESSED HOPE THAT A CEASE-FIRE DEAL COULD SOON BE REACHED. ISRAELI OFFICIALS BELIEVE ABOUT 100 HOSTAGES STILL REMAIN IN CAPTIVITY. ABOUT A THIRD OF WHICH ARE BELIEVED TO BE DEAD. JESSICA? >> IT'S HEARTBREAKING. THANK YOU FOR THE UPDATE. WE WILL CONTINUE TO FOLLOW THE LATEST DEVELOPMENTS IN THATPR ROTEGESI INCLUD