Israel's military says it has arrested around 80 Palestinians in the West Bank, including members of Hamas, as part of efforts to locate three teenagers, including an American, believed abducted in the territory while hitchhiking home.

Spokesman Lt. Col. Peter Lerner said Sunday militants "will not feel safe" until the teens return home.

Prime Minister Benjamin Netanyahu holds the Palestinian Authority responsible for the Thursday night disappearance of the teens. Netanyahu said they were "kidnapped by a terror group."

The Palestinians have rejected blame, saying the teens went missing in territory under full Israeli control.

Among the missing is a 16-year-old American.

The military also said its aircraft struck several targets in Gaza overnight in retaliation for Palestinian rocket attacks on Israel. No casualties were immediately reported.