A Hamas official in Lebanon claimed in an interview with Russian state media that the terrorist group planned Saturday's attack on Israel for two years.

The official, Ali Baraka, told the Russian state-controlled network RT in an interview posted earlier this week that Hamas prepared for the attack while Israel believed it was busy governing Gaza.

The State Department has raised its travel advisory level for Israel and the West Bank to "level 3 -- reconsider travel" due to terrorism and civil unrest.

"Terrorist groups, lone-actor terrorists and other violent extremists continue plotting possible attacks in Israel and the West Bank and Gaza," an alert from the department states. "Terrorists and violent extremists may attack with little or no warning, targeting tourist locations, transportation hubs, markets/shopping malls, and local government facilities."

Both regions were previously at "level 2 -- exercise increased caution."

The advisory also adds increased restrictions for U.S. government employees, declaring they can only travel to Israel for "mission-critical travel."

Gaza remains at "level 4 -- do not travel."

-ABC News' Shannon K. Crawford

President Joe Biden spoke with United Arab Emirates President Mohamed bin Zayed Wednesday to discuss the attacks in Israel, stressing his condemnation of Hamas’ brutality, according a White House readout of the call.

The two leaders also discussed ensuring humanitarian assistance for those in need and Biden's warnings against countries and organizations who may exploit the situation, according to the readout.

-ABC News' Justin Gomez

President Joe Biden said at a roundtable with Jewish leaders on Wednesday that the U.S. is "doing a lot" to rescue the Americans held hostage by Hamas.

"We're working on every aspect of the hostage crisis in Israel, including deploying experts to advise and assist with recovery efforts," he said. "I have not given up hope of bringing these folks home."

Second Gentleman Doug Emhoff also delivered remarks at the roundtable. Emhoff, the first Jewish spouse of a president or vice president, said, "Like all Jews, I feel a deep visceral connection to Israel and its people."

"We witnessed a mass murder of innocent civilians," he said. "The images that we saw will be seared in our brains forever. Rockets falling on cities, people dragged from their homes and shot dead, children sheltering from bullets, bodies lining the streets. And all the while, we see videos of these terrorists cheering on these atrocities. "

"I know you're all hurting. The entire Jewish community is hurting, I'm hurting," he said.

The death toll continues to climb with over 300 people reported dead in Gaza and Israel.

The Palestinian Health Authority said 198 are dead and 1,610 others are injured in Gaza. According to the Israeli Health Ministry over 100 people are dead and over 900 others are injured.

Just before sundown in a western Gaza City, a massive explosion and fireball were reported after Israel warplanes hit a high-rise apartment complex. The Gaza Interior Ministry said the building housed approximately 100 families.