Israel-Gaza-Lebanon live updates: Hamas releases video of American hostage

The Israel Defense Forces has announced carrying out four more airstrikes Saturday in Lebanon, where a ceasefire between Israel and Hezbollah is tentatively in place.

In all four attacks, the IDF says they hit Hezbollah-affiliated targets where they believed operatives were near to, or handling, weapons. It does not appear that Hezbollah has fired any weapons since the start of the ceasefire, nor has the IDF accused them of doing so.

This makes five total IDF strikes in Lebanon on Saturday alone. The IDF announced conducting one on Friday, and one on Thursday.

The Lebanon Ministry of Health said in a statement that a 7-year-old child was among three injured in an Israeli strike on a car earlier Saturday, and an additional person was injured in a separate strike.

The IDF said it is “deployed in the southern Lebanon area, operating against any threat to the State of Israel and enforcing any violation of the ceasefire agreement understandings.”

-ABC News’ Victoria Beaule

At least 75 people were killed in two air strikes in Beit Lahia in northern Gaza, according to Gaza’s Civil Defence.

Video circulating online shows bodies under rubble, which the group said they are unable to reach as they remain trapped.

-ABC News' Samy Zyara

Doctors Without Borders, also known by its French name Médecins Sans Frontières (MSF), is warning that people in Gaza with medical conditions are facing mounting catastrophes this winter.

Shortages of food, medicine, water, shelter and other crucial supplies are at critical levels, the humanitarian group said, and could worsen aid workers' means to provide care.

"Shortages of critical supplies have reached such levels that we are now forced to turn away patients in some facilities," Caroline Seguin, MSF’s emergency coordinator in Gaza, said in a statement. "Restrictions and obstacles to the entry of aid by the Israeli authorities continue to severely hamper our ability to provide care. Meanwhile, the looting of aid trucks within the enclave is making it difficult for that small amount of aid allowed by Israeli authorities to reach those in need. Ultimately, it’s the patients who suffer the consequences."

The Israel Defense Forces launched another airstrike in southern Lebanon on Friday after it said they identified "terrorist activity and movement of a Hezbollah portable rocket launcher."

The IDF said the "threat was thwarted in an IAF strike."

"The IDF is deployed in southern Lebanon and will actively enforce violations of the ceasefire agreement," it said in a statement.

-ABC News' Dana Savir