NEW : CNN 's Ben Wedeman said the lulls , which have been tried before , are n't `` rock solid . '' Fighting nears densely populated Gaza City , witnesses say . The Israeli military says it is responding to rocket fire from the Palestinian territory and that its forces have killed at least one militant in a strike on an apartment building near Gaza's border with Egypt. Israeli artillery ignites buildings , killing 1 and wounding 49 . Leader of Gaza City rocket teams is killed , Israel says . Israeli jets apparently violate Egyptian airspace .
NEW : Fighting nears densely populated Gaza City , witnesses say . The Israeli military says it is responding to rocket fire from the Palestinian territory and that its forces have killed at least one militant in a strike on an apartment building near Gaza's border with Egypt. Israeli artillery ignites buildings , killing 1 and wounding 49 . Leader of Gaza City rocket teams is killed , Israel says . Israeli jets apparently violate Egyptian airspace .