Officials reported that they halted services on a major subway line that circles Beijing on two separate occasions on 28 May 2008, citing unspecified emergencies. Local media sources stated later that the No.2 line was suspended due to technical issues. Officials, after investigating, indicated that the suspensions were due to “signal failure” rather than any security or terrorist related incident. The subway line has since resumed normal operations.

The police presence in Beijing has increased exponentially ahead of the Olympic Games, with strict security checks being fully enforced. As reported in Hot Spots on 9 May, canine units and metal detectors are being implemented as additional security measures at each security checkpoint.