Egypt has been flooding Palestinian smuggling tunnels in Gaza and Sinai, according to a report in Haaretz. Flooding is seen as a low cost way of destroying the tunnels.
The Egyptian army has also been reinforcing its troop presence on the border with the Gaza Strip.
In August of last year, 16 Egyptian border police were killed in a cross-border attack.
While Egyptian-Israeli ties have been shaky since the rise of the Muslim Brotherhood, it appears there is still a willingness on Egypt's part to maintain calm.