The Israeli Air Force struck targets in southern Gaza on Tuesday night after its missile defences intercepted a rocket fired from the Palestinian territory at southern Israel. Israeli jets struck Hamas targets in Khan Younis in the southern Gaza Strip, local media reported. There were no immediate reports of injuries or damage. The Israeli army said on Tuesday that it identified two projectiles fired by from the strip. One was intercepted by an Iron Dome missile defence battery. “If anyone in Gaza thinks he can raise his head after Operation Black Belt, he is seriously mistaken," Israeli Prime Minister Benjamin Netanyahu tweeted on Tuesday night. "We will respond firmly to any attack against us and continue to maintain Israel's security on all fronts.” It was the second incident this week, threatening a fragile ceasefire brokered by Egypt and the UN two weeks ago that ended two days of fighting with Palestinian militants. Earlier in November, Israel killed a senior militant in the Gaza Strip, and the group has launched hundreds of rockets at Israel in response. Israeli retaliatory strikes killed at least 34 Palestinians, including 16 civilians. Unofficial ceasefires have led to months of calm between Israel and Hamas, the militant group ruling Gaza. Meanwhile in Jerusalem, Palestinians held protests against Israel closing several institutions in the Old City last week. Authorities closed down Palestine TV, a branch of Palestine Authority’s Ministry of Education, the Orient House, the Palestinian Prisoner’s Club, and the Commercial Chamber. They said the closures were because of their funding by the Ramallah-based Palestinian Authority. On Tuesday night, there were also reports of a stabbing attack at the Jaffa Gate of Jerusalem's Old City. Israelis claim Jerusalem as its capital, and the Palestinians want the eastern part as the main city of a future state.