An FIR against AAP MLA Alka Lamba will be registered for trespassing after a CCTV footage surfaced showing her walking with a group of people straight to the counter of a sweet shop and toppling a billing machine, said Delhi Police chief BS Bassi on Monday. Meanwhile, BJP leader OP Sharma called Lamba a drug addict and said next time she will be go back on stretcher. Lamba on Sunday started an anti-drug drive from Yamuna Bazar to mark the Quit India Movement Day. She was attacked at Kashmere Gate.