Israeli air strikes continue to hit Gaza as rockets fired from militants in Gaza and Lebanon hit deeper into Israeli territory. 

According to the Associated Press, militants in Gaza have fired more than 550 rockets into Israel, and the Israeli military has said they have hit more than 1,100 targets, most of which are rocket-launching sites. 

An Israeli air strike hit the home of an Islamic Jihad leader Friday. Officials in Gaza also said the air strikes killed a total of eight people overnight, and the Palestinian death toll was raised to more than 100, with around 670 wounded. 

Israel's unceasing air strikes are retaliation for hundreds of rockets that are being fired into southern and central Israel from Gaza. The rockets are reaching deeper into Israel, as warning sirens were heard in the capital of Tel Aviv and the Ben-Gurion airport. The rockets were intercepted and Israel's air traffic was not disturbed.

Israel has shot down 110 Hamas rockets with its "Iron Dome" air defense system. 

Yet, Hamas claimed that it intends to hit the airport, and told foreign airlines to stop flying into Israel. 

While the Iron Dome has shot down most of the rockets, rocket fire from Gaza struck a gas station in southern Israel, wounding one person. 

Rockets also struck northern Israel, near the border with Lebanon. The Israeli military launched artillery fire in retaliation toward southern Lebanon, which is where the rockets were reportedly launched. Israel launched around 25 artillery shells in total. 

The Lebanese military said militants fired three rockets into Israel at around 6 a.m. Friday. 

Lebanon's National News Agency said one of the militants firing the rockets into Israel was wounded and taken to a hospital to receive care. The military in Lebanon said two rocket launchers were discovered and promptly disassembled. 

Shiite militant group Hezbollah, which has launched rockets into Israel numerous times in the past, resides in southern Lebanon. However, the rockets from Lebanon have been attributed to extremist Palestinian groups, not Hezbollah. 

Lebanon-based, al-Qaeda affiliated groups Abdullah Azzam Brigades and the Battalions of Ziad Jarrah have previously claimed culpability for rocket launches into Israel. 

Israel's current barrage of rockets into Gaza began as a defensive move against rocket fire from Gaza. The rocket fire began after three Israeli teenagers were kidnapped and murdered in the West Bank and a Palestinian teen was kidnapped and burned to death in an apparent revenge killing. 

Military spokesman Lt. Col. Peter Lerner said the Israeli military is taking necessary measures to try and prevent civilian deaths. The Israeli military calls inhabitants of the targeted areas ahead of time to warn that an attack is coming, and to therefore evacuate the area. 

Lerner also said that Israeli forces fire "non-explosive munitions" at roofs to warn people to evacuate before they destroy a building. 

He added that Hamas is to blame for the deaths of innocent Palestinians, as Hamas has fired rockets from populated areas of Gaza. 

Lerner told the AP that Israel "uses its weapons to defend its civilians. Hamas uses its civilians to defend its weapons."

Israeli officials are also considering whether or not they should launch a ground operation into Gaza. Facilitating a ground invasion would put Israeli troops at risk, as well as cause more Palestinian civilian casualties. 

The Israeli government authorized the military to call more than 30,000 reservists to replace IDF members on the border for a potential ground invasion in Gaza. 

Israel launched a ground attack in 2009, which resulted in the deaths of hundreds of civilians. Both Israel and Palestinians accused the other side of perpetrating war crimes. 

Former British PM and Middle East envoy Tony Blair said the situation is at a "critical point."

"I think we have got to do everything we can to ... create a situation in which the people in Gaza and the West Bank and in Israel feel that this is not then going to recur and there is some genuine plan in place," Blair told The AP. 

He added that officials are making efforts to facilitate a cease-fire.