JERUSALEM - Israeli authorities say thousands of security forces are making final preparations for a series of Arab protests expected Friday in Israel and along its borders with the West Bank, Gaza Strip and Arab countries.

Police spokesman Micky Rosenfeld says security was heightened on Thursday afternoon. Various police units were moved to different parts of the country.

The Israeli military is also stepping up its preparations. It says it is ready for "any eventuality" and will do "whatever is necessary" to protect the country's borders.

Israeli Arabs and Palestinians on Friday are marking "Land Day," an annual protest against what they say is discriminatory Israeli land policy.

Supporters in neighbouring Arab countries also plan protests in solidarity.