Israel has drafted a record 300,000 reservists in its response to a multi-front Hamas attack from Gaza and is “going on the offensive,” the chief military spokesperson said on Monday.

Since Saturday’s surprise assault, Israeli aircraft have been pounding Gaza targets while its ground forces have battled to retake control of border villages and towns overrun by Palestinian gunmen.

According to Reuters, Chief military spokesperson Rear-Admiral Daniel Hagari said control of those communities had been re-established but that isolated clashes continued as some gunmen remained active.

“We are now carrying out searches in all of the communities and clearing the area,” he said in a televised briefing. Military officials had previously said that their focus was on securing Israel’s side of the border before carrying out any major escalation of the counter-offensive in Gaza.

Hagari said 300,000 reservists have been called up by the military since Saturday, a number suggesting preparations for a possible invasion – though any such plans have not been officially confirmed.