A cache of weapons and ammunition was discovered in a police raid on the towns of Jaljulya and Tayibe, Israel Radio reported on Tuesday.
Assault rifles, magazines, three flash grenades and pistol magazines were amongst the weapons found in Jaljulya.
In a separate police search at a home in Tayibe, a machine gun and several magazines were found.
Three men who were in the home were arrested.
They denied any connection to the weapons.
The police raid was carried out following intelligence that was received by police in an effort to minimize weapons possessed by residents of The Triangle.