Israel said it used a new air defence system overnight.
The Barak Magen was deployed on Monday as part of the country's defence network - see our 9.29am post on the Iron Dome for more.
Sky News defence and security analyst Professor Michael Clarke says: "Any defence system can be overwhelmed by numbers, and the Iron Dome is being overwhelmed in some respects.
"But the Israelis have issued a new clip of their latest system, the Barak Magen system.
"A sea-based one, on one of their missile ships... it can deal with multiple threats at once."
He adds that by releasing clips of the new system, Israel was trying to "keep the spirits up" of the Israeli people after the deaths overnight.