The IDF has said it eliminated a leading Hamas commander Thursday, who was responsible for the Islamist group's rocket arsenal.
If true, Ayman Siam would the most senior terrorist figure killed by Israel since Operation Defensive Edge began three days ago.
But Hamas's "military wing" Ezzadine al-Kassam, denied the report.
"He is continuing in his acts of jihad. We call on the media to be precise and not to rely on Israel's lies."
It comes as Israel continued to batter Hamas and other Gaza-based terrorist groups in a bid to stamp out rocket fire against Israeli civilians.
An IDF statement said that on Thursday morning alone 70 "terror targets" were struck by the air force, bringing the total number of targets hit to over 800 - more than double the number hit by the IAF in 2012 six-day Pillar of Defense operation.
Among the targets were administrative buildings belonging to terrorist groups, smuggling tunnels, concealed rocket launchers, propaganda outlets and the homes of terrorist leaders.
Although most strikes were performed by the IAF, the Israeli navy has also played an active role, succeeded in destroying several Hamas weapons stores and military positions.
Although Hamas's leadership has gone into hiding since the start of the operation, the IDF has upped the pressure on them by destroying their homes.
Among those houses targeted are the homes of some of the top leadership of Hamas and Islamic Jihad, including.
In addition, three senior Islamic Jihad terrorists were killed in an IDF strike on their car this morning.