The Israeli Air Force conducted a strike in Lebanon between Beirut and Sidon, responding to rockets that had been launched at northern Israel Thursday, the Israeli Defense Forces said Friday.

The IDF described the launch of rockets targeting Israel as a “terrorist aggression originating from Lebanese territory.”

Lebanon’s National News Agency said Israeli warplanes attacked a site belonging to the Popular Front for the Liberation of Palestine (PFLP) General Command located in the al-Naama valley at dawn Friday.

The Israeli attack comes in response to an earlier attack in which four rockets were fired from southern Lebanon at northern Israel Thursday, with two of them landing in populated areas, Israel Defense Forces said.

Israeli Prime Minister Benjamin Netanyahu promised his nation would respond.

The United Nations peacekeeping force monitoring the Israeli-Lebanese border, the UN Interim Force in Lebanon (UNIFIL), on Thursday sent a helicopter to investigate the attacks which were reportedy launched from the southern town of Tyre into Israel.

According to the statement, the parties confirmed their interest in keeping the situation under control and pledged to cooperate and work closely with UNIFIL.