The state of Israel and it's nearby allies,, fearing an retaliatory attack from Yemen, have engaged heavy GPS Jamming in and around Israel.
Earlier today, the Israeli Air Force launched heavy sir strikes against Yemen (Story Here).
Rhetoric out of Yemen clearly indicates they are NOT deterred, and "will retaliate swiftly" against Israel.
Apparently, there are signs, detected perhaps by Intelligence satellites or communications, which give credence to the notion of a retaliatory attack, as GPS Jamming is now invoked in and around Israel.
For the record, today alone, Israel attacked: Gaza, Yemen, and Lebanon.