
Courts in Lucknow, Faizabad and Varanasi, as well as other places have been affected.
Lawyers moved about in groups in the court compounds and raised slogans against terrorism. The government has tightened security arrangements in the courts throughout the state after the terror blasts.
On Friday, 13 people, including at least five lawyers, were killed and many more injured in the explosions that took place inside the premises of the courts.
The lawyers are observing 'Shok Divas' or day of mourning. Security is tight in Lucknow and other parts of the state in view of the strike.
A five-member committee, including two retired judges, has been set up to suggest ways and means for improving security in the courts.
Lawyers in at least six other states have joined the strike, these include Karnataka, Bihar and Himachal Pradesh.
On their part, Delhi lawyers have decided to strike against the UP serial blasts tomorrow.