At least nine charity workers have been killed and several others injured in an Israeli strike in Beit Lahia, northern Gaza, the enclave’s Government Media Office said Saturday, making it the deadliest incident since the ceasefire went into effect in January.

In the latest strikes, the Israeli military killed at least nine people, according to the Gaza health ministry. Israel says militants were threatening its forces.

Witnesses said the people were in a car and on a mission for a charity in Beit Lahiya, and they were accompanied by journalists and photographers when the strike hit them.