Israeli forces launch ground operation in Gaza, US officials say

There has been a ground incursion into Gaza by Israeli forces for the past few hours.

Two US officials told CBS News there appears to be a rolling start to the ground invasion in Gaza by Israeli military forces.

Late Friday, Hamas reported clashes with Israeli forces within Gaza, following Israel's announcement of an expanded ground campaign against the group in the region.

"We are confronting an Israeli ground incursion in Beit Hanoun [in the northern Gaza Strip] and in east Bureij [in the centre] and violent engagements are taking place on the ground," the Ezzedine al-Qassam Brigades said in a statement.