New Delhi, Delhi Police Commissioner BS Bassi on Friday said that security has been tightened by the Delhi Police ahead of the upcoming assembly elections. Bassi added that deployment at booth level will start from Friday evening. He further said that senior officer from special control room will be looking at everything so that people may not face any problem while exercising their right to vote. A total of 673 candidates are in the fray for the 70-member Delhi Assembly. Delhi goes to polls on February 7, while the results will be declared on February 10.