Judicial Magistrate R B Pal sent Sinha and 54 others to judicial custody for 14 days after they refused to take bail.
Sinha and 300 others were arrested yesterday after Jharkhand State Electricity Board's (JSEB) Hazaribagh branch General Manager Dhanesh Jha filed an FIR accusing them of tying him up during a demonstration on electricity crisis by the BJP's district unit here.
"Yes, I asked them to tie the hands of the GM as women are the worst sufferers for not getting power. Their children's education is also suffering," Sinha had told reporters.
A senior police officer had rescued Jha from the women.
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Jha had said that the incident was "humiliating and insulting."
According to the police, Sinha and around 300 BJP activists including 50 women, locked the office of JSEB, Hazaribagh unit, around 9 AM and staged a sit-in and did not let any employee enter the office.