Ultra-Orthodox Jews in Jerusalem have clashed with police in protest at what they see as interference by the Israeli authorities in their community, BBC reported.
At least 28 people were arrested after Haredi protesters set fire to rubbish bins and threw stones at police.
The incidents followed the arrest of an ultra-orthodox woman for allegedly starving her three-year-old son deliberately. The child is in hospital.
Jerusalem is home to large Orthodox communities.
Their strict adherence to Jewish law sometimes puts them at odds with more secular Jews.
The protests are taking place in two ultra-Orthodox neighbourhoods, Mea Shearim and Bar-Ilan.
On Thursday, police used horses and water cannon to disperse the black-garbed Haredim.
Police spokesman Micky Rosenfeld said the violence was "something that was not expected".
Anger is high at what has been seen as the "unjust" arrest of the mother, who is said to be suffering from a mental disorder.
Another current Haredi grievance has been the Sabbath opening of a private car park near the religiously sensitive Old City area, when Orthodox Jews abstain from work.