Violence is continuing for a fourth day in Jerusalem. Hamas has launched a rocket attack towards Tel Aviv, after an Israeli airstrike destroyed an office tower in Gaza.

•More than 200 rockets fired toward Israel since Monday
•Over 20 people killed in Gaza, including children, after Israel retaliated
•Two Israeli citizens in Ashkelon have died from rocket fire
•Hamas has launched rockets at Tel Aviv after a major Israeli airstrike in Gaza
•Germany urges all sides to "avoid further civilian casualties"

Gaza militants will pay 'heavy price', Netanyahu says

Prime Minister Benjamin Netanyahu said militants in the Gaza Strip will pay a "heavy price" after a barrage of rockets targeted Israel's largest city, Tel Aviv. He said the ongoing Israeli military operation in Gaza "will take time."
"We are at the height of a weighty campaign," Netanyahu said during a televised address with Defense Minister Benny Gantz.
Gantz said the Israeli military has a "great many targets in the pipeline" that it can strike in Gaza.
"This is just the beginning," Gantz said.

One Israeli citizen killed near Tel Aviv

Israeli medics say a 50-year-old woman near Tel Aviv has died due to the rocket fire.
A bus in the city of Holon, near Tel Aviv, was also struck by a rocket, injuring six people.
A total of three Israeli citizens have now died in the latest round of conflict between Israel and Palestinian groups in Gaza.
An Israeli energy pipeline between the cities of Eilat and Ashkelon has also been damaged due to the rockets, according to local media.

Israel has 'right to defend itself," German Foreign Minister says

German Foreign Minister Heiko Maas defended Israel's response to rockets from
Gaza in a statement.

"The firing of rockets towards Israel is unacceptable and must end," Maas said in a tweet. "Israel has the right to self-defense in this situation. The escalation of violence shall neither be tolerable or acceptable."
The White House has also condemned the rockets and said Israel has a right to defend itself.

Israeli airstrike flattens 13-story building in Gaza
An Israeli airstrike has flattened the 13-story Hanadi Tower office building in Gaza.

Israel claims the building houses the offices of top Hamas officials. The Israeli military says it gave occupants one hour to vacate the premises prior to the airstrike.
It's unclear if there any casualties due to the airstrike. Electricity in the surrounding area went out following the building's collapse.
The leader of the Palestinian Islamic Jihad group said it will now launch rockets towards Tel Aviv in retaliation.
Rocket alarms have gone off in Tel Aviv. All flights have been halted at Tel Aviv's Ben Gurion Airport.
In a statement, Hamas said it shot off 130 rockets at Tel Aviv and its surrounding suburbs.