JERUSALEM, July 22 - The Israeli army intends to step up pinpoint incursions into southern Lebanon but not launch a mass invasion, an Israeli military source said on Saturday.

"You should not expect a full-scale incursion into Lebanon," the military source said.

"We are already inside Lebanon and troops will continue to operate there because it is the only way to act against the Hizbollah bunkers there," the source said.

Israel on Friday ordered several thousand reserve soldiers to report for duty in a possible sign that the army was massing for a ground invasion of southern Lebanon to try to drive Hizbollah fighters away from the border.