TIMELINE - Israeli-Hamas violence since truce ended

(Reuters) - Combat between Israeli troops and Hamas militants raged on Monday as Israel pressed home its ground assault in Gaza in the face of French-led diplomatic efforts to broker a cease-fire.

Here is a timeline of events since early December:

December 14 - Hamas leader Khaled Meshaal says the group will not renew a six-month-old truce with Israel.

December 18 - Hamas declares the end of the Egyptian-brokered cease-fire, which expires the next day with a surge of cross-border fighting.

December 24 - Gaza Palestinian militants ratchet up rocket fire towards Israel.

December 27 - Israel launches massive air strikes on Gaza in response to the intensified rocket and mortar fire killing at least 229 Palestinians.

December 28 - Hamas says an Israeli air strike destroys a laboratory building at the Islamic University, a significant cultural symbol of Hamas.

-- Israeli aircraft bomb some 40 smuggling tunnels in the Gaza Strip that provide a lifeline to the outside world.

December 29 - Israel steps up its air strikes and bombs the Hamas-run Interior Ministry, the first air strike targeting a government building in the offensive.