Israel knows where the enemy is in their country and has surrounded all the Palestinian cities in Judea and Samaria, aka the West Bank, in order to prevent attacks from those areas.

Here’s more from JPost:

The IDF early Friday morning surrounded all Palestinian cities in the West Bank immediately after it preemptively struck Iran.

It waited until after the aerial attacks started so as not to tip off the Islamic Republic, but then acted rapidly and forcefully to preemptively cut off any unusual terror attack or invasion attempts.

The IDF Central Command set the entire area on emergency status.

Further, the military called up reserves and reinforcements for all fronts and parts of the West Bank.

In addition, the IDF reinforced all border fence areas between the Palestinian and Jewish portions of Judea and Samaria.

Very prudent.