Israeli warplanes hammered the Gaza Strip neighborhood by neighborhood on Tuesday, reducing buildings to rubble and sending people scrambling to find safety in the tiny, sealed-off territory as Israel vowed a retaliation for Hamas’ surprise weekend attack that would “reverberate … for generations.”

Aid organizations pleaded for the creation of humanitarian corridors to get aid into Gaza, warning that hospitals overwhelmed with wounded were running out of supplies. Israel has stopped entry of food, fuel and medicines into Gaza, and the sole remaining access from Egypt shut down Tuesday after airstrikes hit near the border crossing.

The war began after Hamas militants stormed into Israel on Saturday, bringing gunbattles to its streets for the first time in decades. More than 1,800 lives have already been claimed on both sides, and perhaps hundreds more. Hamas and other militant groups in Gaza hold more than 150 soldiers and civilians hostage, according to Israel.

Wall Street Journal reporter Evan Gershkovich lost an appeal Tuesday to be released from jail on espionage charges, meaning he will remain behind bars at least through Nov. 30.

Gershkovich, 31, had a mostly blank expression as he appeared in the defendant’s glass cage in Moscow City Court in blue shirt, T-shirt and jeans. He marked six months in custody on Sept. 29.

It was the second time in less than a month he had appeared before a judge to appeal an August decision to extend his pre-trial detention through November. On Sept. 19, the court declined to hear the appeal, citing unspecified procedural violations.

The U.S. Embassy in Moscow said in a statement that it was “deeply disappointed” that Gershkovich’s appeal was rejected, adding: “Evan should be released.”

Auto workers walked off the job at three General Motors facilities in Canada early Tuesday after failing to reach agreement with the automaker.

Their union, Unifor, represents more than 4,200 workers at the plants. They had warned they would begin a strike if no agreement was struck with GM by midnight local time.

“We made some progress throughout the day, but sadly not enough,” Unifor President Lana Payne told reporters. She said the union was still speaking with the company, but there was “a lot of ground that needed to be covered to reach a tentative agreement.”

The action came after Unifor workers ratified a new three-year labor contract with Ford late last month. They are seeking a similar agreement with GM.

Lily Lupardus can be reached at lupa5957@stthomas.edu.