The Israeli army began attacking Hamas terror targets in Gaza in the wake of a rocket attack by the terrorist group that leveled a house in central Israel and injured 7.

The Israel Defense Forces also sent two additional brigades to the Gaza border area – one infantry and one armored — and began a limited call-up of reservists for other units.

Sources in the Gaza Strip confirmed to Ynet that Hamas fired the rocket on Monday morning, but said the terror group did not expect a massive response from Israel so close to the elections on April 9. But Haaretz reported that the steps taken in response show that Israel is preparing for a campaign likely to last several days, if not more.

Prime Minister Benjamin Netanyahu was cutting short his trip to Washington, D.C., to deal with the aftermath of the attack. Netanyahu also serves as Israel’s defense minister.