Three ultra-Orthodox Jews were wounded, two of whom suffered stab wounds to the head, after a fracas with secular bystanders erupted in Jerusalem before dawn on Saturday.
The three were taken to Sha'arei Tzedek Hospital in Jerusalem, where they are listed in light to moderate condition.
Police have yet to determine the cause of the incident.
Relations between secular and religious Jews in the capital have been on edge since the mayor opened a parking lot on the Sabbath, sparking violent protests from the Eda Haredit ultra-Orthodox sect.
In the Old City of Acre, a 23-year-old youth was shot in the stomach and wounded moderately. He was taken to hospital in Nahariya for treatment. Police believe the incident to be a dispute between criminals.
In the Galilee town of Karmiel, a 17-year-old boy was stabbed in his chest during an altercation. He suffered moderate to serious wounds. Police arrested two suspects in connection with the incident. Both men are residents of the nearby town of Dir al-Asad.
Two residents of the Galilee village of Arabeh were wounded in a drive-by shooting. Police know the identity of the suspects, though they are trying to ascertain the circumstances of the shooting.