"Life has returned to normal and the situation (law and order) is under absolute control," Saran District Magistrate Deepak Anand said in a statement.
There is no report of any untoward incident from anywhere in Saran district during the day, he said adding that the para-military forces carried out a flag march at Chapra town to keep the situation under control.
He said that the rumour-mongers were being identified for taking strict action.
He said that the police was patrolling at sensitive places with senior civil and police officials monitoring the situation in Chapra town.
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Anand said that 25 persons were arrested in connection with the violence while two others had been nabbed earlier in connection with the objectionable photo and video circulation.
The DM said that two companies of State Rapid Action Force, one company of Central Rapid Action Force, two platoons of SSB, two platoons of ITBP, 500 police personnel with sticks besides personnel from the district police were deployed in the district as a precautionary measure.
The district administration had shut down internet service in the district as part of measures to restore peace.