A probe is also being carried out in 7,398 tip-offs related to terrorism.
Security was beefed up after a terrorist attack at the Forbidden city here in 2013 in which five persons including three suicide attackers from Xinjiang were killed.
In addition, police conducted 11 anti-terror drills in 2014, a spokesperson of Beijing Municipal Public Security Bureau said.
As terrorist activity is on a rise, the police have improved their capability in intelligence, in handling emergencies and in the chain of command, he said.
The number of robberies and murder hit a decade low last year with nearly 72.1 per cent of such cases brought to a satisfactory conclusion. There were over 3,400 drug cases, up by 51.7 per cent and 148.6 kilogrammes of illegal substances were seized.