The protest by Bihar Public Service Commission (BPSC) aspirants demanding a re-test of the 70th Combined Competitive Examination (CCE) escalated today in Patna, prompting the police to resort to lathi charges and use water cannons. Earlier in the day, thousands of students gathered at Gandhi Maidan before marching towards JP Golambar, intending to proceed to Chief Minister Nitish Kumar's residence. The police had not approved the move. The BPSC aspirants were also demanding a meeting with chief minister to discuss the issue. The All India Students' Association (AISA) called for a 'chakka jam' on Monday in protest against the use of force by the police on students.