Israel-Gaza live updates: Hostages 'brutally murdered' just before recovery, IDF says

Forensic examinations on the bodies of six Israeli hostages recovered on Saturday determined they were all killed "in a number of short-range shots," the Israeli Health Ministry said on Sunday.

It was estimated that the hostages were killed sometime between Thursday and Friday, or 48 to 72 hours before the forensic exams were performed, according to the Ministry of Health.

"Early in the morning, the bodies of the abductees arrived at the National Institute of Forensic Medicine to determine the cause of death," the Ministry of Health said in a statement. "In an examination conducted at the National Institute of Forensic Medicine, it was found that the six abductees were murdered by Hamas terrorists in a number of short-range shots."

-ABC News' Anna Burd

Israel's national trade union, representing the majority of the country's unionized workers, announced it will hold a one-day general strike on Monday in an attempt to pressure the Israeli government to agree to a cease-fire and hostage deal.

Members of the Histadrut labor federation plan to walk off jobs across the nation at 6 a.m. local time Monday, said union chief Arnon Bar-David.

The union, comprised of 800,000 members, said the "Israeli economy will stop" during the strike.

Bar-David said the strike will prompt Israel's international airport to suspend operations at 8 a.m. Monday, including all takeoffs and landings.

"I will not tolerate abandonment [of hostages]," Bar-David said at a news conference on Sunday.

The Histadrut union is affiliated with dozens of sub-unions, including civil service, nurses, engineers, lawyers and industrial workers, officials said.

-ABC News' Dana Savir

The funeral of killed American Israeli hostage Hersh Goldberg-Polin will take place on Monday at 4 p.m. local time (9 a.m. ET) at the Har Hamenuchot cemetery in Jerusalem, his family has announced.

The funeral announcement described Goldberg-Polin as "a child of light, love and peace."

The 23-year-old was among the six hostages found dead inside a tunnel under the southern Gaza Strip on Saturday. The IDF said the captives had been killed by militants shortly before their recovery. Hamas has blamed Israeli bombing for their deaths.

-ABC News' Jordana Miller, Victoria Beaule and Josh Einiger

Israeli Prime Minister Benjamin Netanyahu and Hamas traded blame early Sunday for the two sides' inability to reach a cease-fire deal, as both responded to the recovery of six hostages' bodies from Gaza.

Netanyahu released a statement accusing Hamas of refusing to negotiate, saying he was ready to move forward with a deal on May 27 -- with the backing of the U.S. -- and an updated proposal on Aug. 16, when Hamas was not taking part in negotiations after the killing of its political chief and lead negotiator Ismail Haniyeh.

Hamas, for its part, said in a statement that Israel insists on continuing the war and "evading" a cease-fire agreement. The group blamed Israel and the U.S. for the deaths of the hostages recovered on Saturday, saying the six captives were killed by Israeli bombing.

Hamas said it agreed to one of the U.S. proposals for a deal, but that Netanyahu added conditions -- backed by the U.S. -- which were unacceptable.

Netanyahu's conditions, the group alleged, were "aimed at obstructing reaching an agreement to preserve his power."

-ABC News' Jordana Miller, Samy Zyara, Guy Davies and Victoria Beaule