Hamas leader Yahya Sinwar fled northern Gaza at the beginning of the fighting by hiding in a humanitarian convoy heading southward, the Kan public broadcaster says citing an Israeli official familiar with the details.

Sinwar escaped Gaza City and headed toward south Gaza’s Khan Younis in a vehicle that provided “humanitarian cover,” the report says, adding that more precise details of the vehicle are barred from publication at this point.

The report adds that Israel’s assessment is that Sinwar is still in Khan Younis, or rather in one of the tunnels that run underneath it.