Israeli Defense Minister Ehud Barak has reportedly approved the summons of 30,000 reserve soldiers. The troops can be called into action by the military at any point, an IDF spokesman told Israel's Channel 2 TV, the Voice of Russia reported.
Brigadier General Yoav Mordechai said the army was in the process of expanding the Gaza operation.
Some of those called up would be dispatched to replace existing units in their routine duties.
According to Mordechai, the army plans to continue its attacks on terror targets in Gaza until the operation's goals are met. He added that it was "far too early to talk about a ceasefire."