Palestinian militants fired rockets into Israel on Monday after an Israeli air strike in Damascus killed two members of the Palestinian Islamic Jihad militant group.
Israeli jets carried out strikes on Islamic Jihad positions in Syria just before after the militants and Israeli forces clashed over the Gaza border.
The strikes in the Adeliyah region outside Damascus targeted what the Israeli military called "a hub of Islamic Jihad's activity in Syria", including the research and development of weapons.
Islamic Jihad later said in a statement that two of its members were killed in the air strike. Israeli Defence Minister Naftali Bennett said: "We have eliminated six terrorists in the past 24 hours, not just in Gaza."