Despite Egyptian efforts to kill the tunnel trade between Gaza and Egypt, somehow the Palestinians are still managing to dig more.
Palestine Today reports that Egyptian forces blew up a "commercial" tunnel connecting the Egyptian side with the Gaza Strip, but no injuries were reported. A huge explosion shook the city of Rafah in the southern Gaza Strip, indicating that the explosion was caused by the bombing of a tunnel from the Egyptian side.
Egypt had planned to, and as far as I know did, clear out all land in Rafah for a couple of hundred meters at the border to be able to detect any tunnels.
I don't know whether it is Hamas or enterprising Gaza traders building these.