Passengers taking local and long-distance buses would be subjected to security checks from Aug. 1, the public security bureau said Wednesday.

The checks would cover luggage and ID cards, police said. Taxi passengers will also have to pass security checks, but police did not say how this can be implemented.

Flammables, explosives, knives, guns, toxic chemicals, corrosive materials, radioactive substances and infectious disease pathogens would be banned.

More than 600,000 passengers were being checked at Metro stations each day since security checks were launched June 15.