According to the police, the accused have been identified as Vishnu, 21, Gourishankar, 21, Rahul, 19, and Aneesh, 19, of Maruthoorkadavu.
Four youths have been arrested by the Fort police in connection with the alleged attack on the Attukal Devi Hospital at Manacaud and the manhandling of its staff recently.
Equipment and furniture to the tune of ?5 lakh had been damaged in the incident, it was alleged.
The police added that at least 10 more persons remained to be apprehended in connection with the case.
They were remanded in judicial custody after being produced in a local court.
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