A Sderot kindergarten building was badly damaged and two Israelis were treated for shock late Friday night after Gaza terrorists launched a Qassam rocket attack at the southern Israeli city.

About 15 seconds after residents were awakened by the wail of the Red Alert rocket alert, the “boom!” that comes with a rocket impact was heard — and felt — in the Gaza Belt city.

Families in Sderot and the Sha’ar Hanegev Regional Council district, and in Sapir College were forced to “wake up and run” for safe spaces late Friday night when the siren activated at 11 pm.

The rocket landed just a few seconds later.

Rocket strike in city of Sderot in south. 1 explosion heard. Heavy damage caused to building. Police units at scene. pic.twitter.com/CeC0XedWTq

— Micky Rosenfeld (@MickyRosenfeld) July 1, 2016

Although religious observant families were wrapping up the Sabbath night meals and getting ready for bed at the time, many other secular Jews with young children were already fast asleep. Parents were forced to tear their children from beds to make a run for the bomb shelters — an exercise that has become second nature to many, and which triggers a flood of fear in too many more.

The kindergarten building that sustained a direct hit — badly damaged — was empty at the time, and no one was physically injured in the attack.

But medics from the Magen David Adom emergency medical response service treated two people who were near the impact site, both for shock.

Police units were deployed to the scene.

At the time of this writing — prior to the start of the Sabbath in New York — officers were ordered to remain on site.

Residents of southern Israel were sent running to shelters Wednesday night when they heard the Red Alert air raid siren warning them of an incoming rocket attack in Gaza Belt region communities.

However, Israeli defense officials notified media within the hour that apparently the sirens that activated in numerous Gaza border communities had been triggered by mistake, and the alert was a “false alarm.”

Reportedly there were sounds of explosions on the other side of Israel’s southern border in the northern Sinai Peninsula, but it is not clear whether the two incidents were related.

See the siren update at the bottom of the article.

In Palestinian Authority mosques throughout Judea and Samaria, the Arabs will be replacing their calls to prayer, incitement speeches and Islamic messages with the Naqba siren, at noon on Sunday, according to security sources.

Naqba Day commemorates the day when the neighboring Arab countries and people gathered together to attack and destroy the fledgling Jewish state in May of 1948 – and spectacularly failed, proving that despite Islam’s replacement theology, Allah is a Zionist.

The siren will sound at noon for 2 minutes, and all PA pedestrians will try to stop throwing firebombs and stones, as well as driving their cars into Jews and blowing up buses and restaurants. They will stand at attention, in yet another cheap imitation of Israel.

It may be the safest two minutes in Israel’s history.

As of Sunday morning there have been reports of Arab stone throwing in multiple locations, and one Israeli driver was injured after a stone hit his car in the Binyamin region.

As an aside, we’re eagerly waiting to see what the Israeli-Arab MKs in the Knesset will be doing at noon.

So if you hear the siren, don’t get nervous, it’s not an air raid. It’s just the Arabs upset they didn’t succeed at genocide in 1948.

Happy Naqba Day.

Update: Sirens were not heard in western Gush Etzion, Hebron, Kedumim, Maaleh Efraim nor Maaleh Adumim.

The siren was heard in the Talmon-Dolev area in the Shomron, east of Modi’in.

One person from Beit El reports hearing a siren, others in Beit El didn’t.

We are waiting to hear reports from other areas of Judea and Samaria.

The Israel Air Force struck four Hamas terror targets in northern Gaza on Saturday following a barrage of rocket attacks fired at southern Israel on Friday night.

Red alert sirens activated in Sderot and the Sha’ar HaNegev Regional Council district, sending families scrambling for cover shortly after 10 pm.

Four Qassam rockets launched from Gaza exploded in open fields around the district within seconds after the alerts sounded.

Gaza’s ruling Hamas terror organization claimed responsibility for the attack.

The rocket attack was “just one example of extremist incessant efforts to threaten the security and safety of the people of southern Israel,” said IDF Spokesperson Lt. Col. Peter Lerner. “The IDF will continue to act to protect against those who threaten innocent lives and Israel’s sovereignty.”

In response, Israeli fighter pilots were in the skies over Gaza by morning to retaliate. Local sources said missiles landed near a Hamas training base.

Hamas officials told international media that a family home near Beit Lahiya was hit by debris from the attack, allegedly killing two Arab siblings, ages 10 and 6, in the process.

Alon Shuster, head of the Sha’ar HaNegev Regional Council, expressed sorrow for the Gazan casualties. Still, he said, “These injuries are a result of the justified response of the State of Israel to the aggression against it. Our residents not only demand quiet, they also are creating a routine: Just after the (rocket) fire, my son went out to a party set for that time in [local community] Nahal Oz.”

Tazpit Press Service contributed to this article.

At 10:05 AM, all across Israel, air raid sirens sounded as part of a nationwide drill.

Students participated in the Home Front exercise in different ways, from assisting security crews to going into bomb shelter.

Home Front Command is continuing its testing of the Code Red incoming rocket alert siren, with today’s (Wednesday July 22) activations performed in Jerusalem.

The test was carried out in the morning, with the sound of the Code Red rocket alert siren being heard throughout the city of Jerusalem and in the surrounding suburbs, including Giva’at Ze’ev and Ma’ale Adumim.

In an actual emergency, the sound of the siren would rise and fall THREE TIMES IN SUCCESSION.

This morning’s activation was only a test.

False alarm early warning rocket sirens sounded shortly after 4:30 p.m. from the northern border with Lebanon to the Lower Galilee.

Multiple rocket sirens went off throughout northern Israel shortly after 4:30 p.m. (9:30 a.m. EDT) Sunday.

The warning sirens sounded near the northern border with Lebanon and as far south as the Lower Galilee, including Mount Tabor and Emek Jezreel, several miles west of Beit Shean.

There were no explosions, and the IDF said the sirens went off due to a technical failure.

Or, the sirens were a very early warning for what might happen next year.