(IsraelNN.com)  The Hamas-Israel ceasefire, which Hamas is assumed to be using to build up its arsenal against Israel, saw two mortar shells fired at Israel late Sunday afternoon. 

The shells were fired from near the Karni Crossing in north-central Gaza, but did not reach Israel, landing instead in Hamas Authority-controlled area.

Around the same time, ongoing Hamas smuggling of weapons, fuel and drugs into Gaza took a hit when two smugglers were killed in a tunnel collapse. The tunnels were part of a maze of dozens of such conduits passing under the Gaza-Egpyt border near Rafah.

Two others Hamas smugglers were killed in a similar collapse on Thursday. 

Israeli officials such as MK Yuval Shteinitz (Likud) and General Security Service chief Yuval Diskin have strongly criticized Egypt for not acting strongly to stop the smuggling activity into Gaza.  In the first six weeks of the ceasefire this summer, four tons of explosives were smuggled into Gaza.