JERUSALEM -- Israel warned that it will launch a heavy attack if rocket fire from the Gaza Strip continues.

Speaking at the start of Israel's weekly cabinet meeting, Prime Minister Benjamin Netanyahu said that his country "will not tolerate any attacks," referring to two rockets launched overnight from Gaza toward Israel.

No group immediately assumed responsibility for the rockets. However, Israeli Defense Minister Benny Gantz said Hamas, an Islamist Palestinian movement that runs Gaza, should be held accountable.

He said the government is working "in several directions, operational and others, to bring long-term tranquility" to the area.

Israel responded to the rockets with a counter-attack at Hamas targets in Gaza. No casualties or injuries were reported on both sides.

Local Israeli media reported that the army was looking into the possibility that the rocket fire was not intentional but due to a malfunction caused by a lightning storm.