Agra, May 27 -- Opposition parties have demanded effective action against those who thrashed four Muslim youths on suspicion of carrying beef in Harduaganj area of Aligarh on Saturday. These leaders met SSP Aligarh on Monday and sought arrests of those named in the FIR (first information report) filed by family members of the youths beaten and undergoing treatment. Three of the accused have been arrested and sent to jail, while some others are being questioned in police custody, police said. "We met SSP, Aligarh, Sanjeev Suman, on Monday and expressed our concern over the incident, which happened on Saturday. We also urged Aligarh police chief for effective steps to avert such attacks in the future," stated Laxmi Dhangar, the district president of Samajwadi Party in Aligarh. "The small traders dealing in meat business should be provided police security because most of the time, these cow vigilantes extort money while lodging false allegations of beef business. Those beaten on Saturday were stopped on the same allegations earlier but were allowed to go when they complained to Akrabad police in Aligarh," stated Dhangar. Meanwhile, SP, rural, Aligarh, Amrit Jain, said that cases have been registered on complaints from both, those alleging beef was being transported and also of the family members of those beaten up....