I support Mr Seow Joo Heng's suggestion ("Install metal detector gates at MRT stations"; July 11).

Recently, I went to Guangzhou, China, and found that scanners were installed at all train stations.

All bags had to pass through the scanner and commuters were checked by a hand scanner.

There will be some delays in commuting, but it is worth the effort and money to adopt such a procedure.

If a densely populated Guangzhou is able to implement this, so should Singapore.

Christine Ho (Ms)