BEIRUT (AP) — An Israeli drone strike in southern Lebanon killed five people Sunday, including three children, Lebanon’s Health Ministry said. Two others were wounded, including the mother in the family.

The Israeli military said it was targeting a Hezbollahmilitant, and that he “operated from within a civilian population.” It acknowledged that civilians were killed and that it was reviewing the incident.

Israel frequently says it is targeting Hezbollah militants or infrastructure in the tiny country’s battered southern region. Hezbollah has only claimed firing across the border once since the ceasefire, but Israel says the militant group is trying to rebuild its capabilities.

Lebanese Parliament Speaker Nabih Berri said four of those killed, the three children as well as their father, held U.S. citizenship. The U.S. State Department, however, said none of the five appeared to be a U.S. citizen, but the situation was still “fluid.”

Since a ceasefire agreement was reached in November to end Israel’s monthslong war with the Hezbollah militant group, Israel has continued to strike southern and eastern Lebanon almost daily.